(2) 4-6 Lewis's scientist father has long been discredited for his theory that inhabitants of the underwater city Atlantis have been sending tsunamis to destroy American coasts, an Atlantean retaliation for the pollution of the ocean. When one of the tsunamis carries father and son, along with talented engineer Hanna, far undersea in their subsphere vehicle, they learn that the theory was ­absolutely right. Meanwhile Kaya, an Atlantean, has always been told that there are no "People of the Sun" dwelling near ocean surfaces: to suggest otherwise is treason. When Kaya encounters the three from the surface, she knows they're doomed if she doesn't help them evade Atlantis's ­surveillance squad, the "Erasers." This steampunkish sci-fi/fantasy ­adventure is quickly paced, an inventive, if far-fetched, engagement of plastics pollution and ­climate change--as well as a diverting vision of Atlantis's underwater technology. Lewis's middle-grade wackiness is quietly funny and realistic; he is blinkered by his own cultural formation but is a fount of imaginative diversions. With the book's conclusion perched on the eve of the travelers' return, Mone seems to be promising a sequel. An afterword discusses Atlantis's lore and the current crisis of plastics pollution in Earth's oceans.

Reviewer: Deirdre F. Baker | Horn Book Magazine Issue: July, 2021

(4) 4-6 Seaborne series. Dean, Ronan, and Waverly get themselves mixed up with some nasty pirates who force them to rob a fancy resort. Unfortunately, the trio ends up in Atlantis, in the middle of an attempted coup. While Ronan and Waverly remain underdeveloped characters, we do see some much-needed rounding out of Dean. The action is exciting, and the plot turns keep things moving.

Reviewer: Antonio Trujillo

(4) K-3 Bolt: Strange...but True? series. This hi-lo volume explores the historical and modern fascination with the lost city, and why some believe Atlantis existed and why others think it's a myth; ultimately, readers are asked to decide for themselves. The slight discussion is illustrated with a jarring mix of photos and computer renderings and includes a short "Believe It or Not?" quiz. Reading list, websites. Glos., ind.

Reviewer: Lauren Chambers

(3) 4-6 Kara Danvers works as a reporter, but as her alter ego, Supergirl, she protects National City. In Atlantis, the appearance of a humanoid sea creature causes normal people to become "supercitizens." In Ancients, a curse sends Supergirl and friends back in time to Ancient Rome. Lighthearted and action-packed, these additional stories set during the second season of TV's Supergirl will satisfy fans of the new DC canon. Review covers these titles: Supergirl: Age of Atlantis and Supergirl: Curse of the Ancients.

Reviewer: Jenn Matters

(4) 4-6 Barron's trilogy (Atlantis Rising; Atlantis in Peril) wraps up as immortal thief Promi confronts the wraith-like warlord Narkazan one last time to save the mortal and spirit realms from his tyrannical rule. The final battle's resolution is rushed and the farewells leading up to Atlantis's imminent destruction are distractingly long. Nevertheless, rich language, selfless heroes, and engrossing action make for a fan-pleasing finale.

Reviewer: Russell Perry

(3) YA Waterfire Saga series. In this finale to the four-part mermaid epic, the descendants of the Atlantean mages face their hardest challenges yet. Astrid comes face-to-face with her terrible ancestor Orfeo, Ava confronts deadly spirits, Sera leads the resistance into war, and Ling smokes out a spy. Political intrigue, thrilling battles, and strong female characters produce a satisfying ending that hints at possible future stories. Glos.

Reviewer: Lana Barnes

(4) 4-6 Mysteries of History series. While documents throughout history have suggested Atlantis was real, evidence has eluded archeologists. This volume presents a concise history of the mystery, cases for possible locations, and theories about what might have happened to Atlantis. With frequent inserts (and an appendix) of comprehension activities, publisher's links, and writing prompts, the series is more focused on core standards than general research. Reading list. Glos., ind.

Reviewer: David Elzey

(4) 1-3 Yeti Files series. Blizz the yeti and his cryptid pals are called on by merfolk to help save the underwater city of Atlantis from its mayor, who is over-mining the sea's powerful crystals that keep the city running. Absurdity abounds on every busily illustrated page of the adventure, which includes a subtle message about taking care of the environment.

Reviewer: David Elzey

(3) 4-6 After creating the island of Atlantis, immortal thief Promi believes that he has banished the spirit warlord Narkazan forever. But the vengeful wraith returns, seeking to plunder Atlantis' resources in order to conquer both the mortal and spirit realms. With lush description and engaging characters, Barron expands on the rich world he created in Atlantis Rising, building toward the next installment.

Reviewer: Russell Perry

(4) 4-6 Emily Windsnap series. Illustrated by Sarah Gibb & Natacha Ledwidge. The sixth book features half-mermaid Emily on an island field trip when a ghostly ship appears. Caught between this world and mystical Atlantis, only Emily can rescue the passengers from disappearing forever. Imaginative details of human and mer worlds coexist with simplistic characterization and other narrative turnoffs that fans of the light series may overlook. Black-and-white spot art opens each chapter.

Reviewer: Jeannie Coutant

(3) K-3 Unexplained: What's the Evidence? series. Lassieur outlines Atlantis stories from Greek mythology and Plato into the nineteenth century. She presents various theories about where Atlantis might have been and what could have happened to it, but necessarily leaves her title question unresolved. Other lost cities are touched on towards book's end. Illustrations are plentiful, ranging from drawings to photographs of statuary and ancient ruins. Reading list, websites. Glos., ind.

Reviewer: Miriam Lang Budin

(3) 4-6 Enduring Mysteries series. Was Atlantis a real place, or merely myth? If it existed, where was it located, and what kind of people lived there? Karst explores these questions with a linear narrative that will engage upper-elementary and middle-school readers; it begins with Plato's account and moves through history to modern-day technology, with abundant glossy photographs and maps breaking up the text. Websites. Bib., glos., ind.

Reviewer: Lisa Catherine Findlay

(3) 4-6 When teenage thief Promi is caught stealing from Ellegandia's corrupt ruling elite, he discovers that his strange birthmark connects him to a prophecy foretelling "the end of all magic." He joins forces with Atlanta, a young woman fighting to save the magical Great Forest, for a good-versus-evil battle. A rich, intricate take on the origins of Atlantis, first in a planned trilogy.

Reviewer: Russell Perry

(4) YA Atlanteans series. Owen, his crush Lilly, and bully-turned-ally Leech venture into the parched, plague-stricken landscape beyond protected EdenWest in search of an ancient artifact that can reverse global warming. While the plotting is imaginative, the limp love triangle and muddled world-building sap some of the narrative's tension; the combination of hard science and mystical prophecies may not convince all readers.

Reviewer: Claire E. Gross

(4) YA Eureka promised her mother that she would never cry. But now her mother is dead, her best friend is possessed, and someone is stalking Eureka--someone who brings Eureka closer to tears than anyone before. Although underdeveloped character motivations jeopardize credibility, the plot--that Eureka's tears can raise Atlantis--is intriguing enough to keep readers turning the pages.

Reviewer: Rebecca Donahue

(4) 4-6 Seven Wonders series. Thirteen-year-old Jack McKinley is kidnapped along with three other teens to form the Select, descendants of Atlantis who will die without seven Atlantean artifacts called the Loculi. Mistrustful of the professor who wants to use their talents, Jack and the others still seek the first Loculus in the Colossus of Rhodes. Satisfyingly intense action sequences hang on a shaky, formulaic plot scaffolding.

Reviewer: Anita L. Burkam

(4) YA Atlanteans series. In this story set following a global-warming crisis, Owen is selected to attend Camp Eden in one of Earth's four BioDomes. The lies told by the camp's administration along with Owen's physical transformation (he grows gills) set him and his friends on a quest for the truth. Though not a totally successful dystopian story, the novel will still keep many readers intrigued.

Reviewer: Madoka Fukai

(4) 4-6 Mysterious Encounters series. Five chapters--from "Peering into the Future" to "Failed Prophecies"--discuss the history of future-telling. The Bible, Nostradamus, and modern-day sources are included, along with any basis in fact (or not). Photos, illustrations, pull-quotes, and sidebars break up the dense text. Reading list, websites. Ind.

Reviewer: Elissa Gershowitz

(4) 4-6 Artemis Fowl is suffering from the Atlantis Complex, a fairy mental disorder that makes him obsessive and delusional. In spite of his confusion, he needs to save the underwater city of Atlantis from an evil fairy, with help from Butler, Holly, and other returning characters. Entertaining action scenes will appeal to this series' many fans, who will enjoy the familiar but formulaic fun.

Reviewer: Beth L. Meister

(3) 4-6 Thatcher Hill is staying with his great-uncle--owner of Professor Griswald's Museum of the Strange and Curious and Gift Emporium--in a dumpy California beach town. Soon enough, Thatcher finds himself saving the town from a witch and her army of enchanted sea monsters. The fast-paced adventure is equal parts funny, gross, and far-fetched. Thatcher is the quintessential reluctant hero who rises to the occasion.

Reviewer: Maeve Visser Knoth