Perfect for budding scientists and history buffs, as well as fans of The Goonies and Rick Riordan, Infinity Base is the thrilling finale to the Omega City series, from acclaimed author Diana Peterfreund.

Gillian Seagret thought she knew everything about the secrets of Omega City, the mysteries of the rocket scientist Dr. Underberg, and the evil conspiracies of the organization called the Shepherds. But she’s about to learn that uncovering the truth is the easy part. You also have to fight for it.

Now Gillian’s father has been taken captive, and she and her friends are trapped in the Shepherds’ hidden base. The only person who can help them is a rogue Shepherd, but she has plans of her own, and no one—least of all Gillian’s mother—is sure they can trust her.

New clues to Underberg’s past lead them back into an utterly transformed Omega City and farther than they even imagined, into outer space. There, Gillian, Eric, Savannah, and Howard discover the Shepherds’ most precious secret, and they realize there’s more at stake than simply their family and Underberg’s legacy—they also have to save the world.

Full of thrilling adventure, cliffhangers, and conspiracies, this epic conclusion to the Omega City series is not to be missed.

Diana Peterfreund is the author of many books for adults and children, including the critically acclaimed For Darkness Shows the Stars and Across a Star-Swept Sea. She lives with her family outside Washington, DC, in a house full of bookshelves, and is always on the lookout for lost cities or stray rocket ships.

Praise for OMEGA CITY: “Young readers looking for a page-turning quest should get into this planned series on the ground floor.” — Booklist (starred review)

Praise for OMEGA CITY: “[A] fast-paced series opener” — Publishers Weekly

Praise for OMEGA CITY: “Omega city is a treat…an exciting read, hard to put down, and just plain fun.” — Voice of Youth Advocates (VOYA)

Praise for OMEGA CITY: “A crowd-pleaser in the spirit of The Goonies” — Bulletin of the Center for Children’s Books

Praise for ACROSS A STAR-SWEPT SEA: “[A] mysterious spy adventure in a lush and terrifying futuristic world” — Voice of Youth Advocates (VOYA) (starred review)

Praise for ACROSS A STAR-SWEPT SEA: “A charming bit of light adventure” — Publishers Weekly

Praise for ACROSS A STAR-SWEPT SEA: “Peterfreund’s novel is riveting and intense...Readers will love this page-turning story and its dramatic climax.” — Romantic Times

Praise for ACROSS A STAR-SWEPT SEA: “Engrossing and fastpaced.” — Booklist

Praise for ACROSS A STAR-SWEPT SEA: “Complex in both plotting and themes, this science fiction revision of The Scarlet Pimpernel offers political intrigue, narrow escapes, and forbidden romance” — Bulletin of the Center for Children’s Books

Praise for ACROSS A STAR-SWEPT SEA: “A well-paced story led by a strong and likable heroine.” — School Library Journal

Praise for ACROSS A STAR-SWEPT SEA: “Across a Star-Swept Sea is, like its main character Persis Blake, a delight. Intrigue, romance, beautiful world-building, nuanced characters, and timely, intriguing questions come together to make this the perfect read. I loved it!” — Allie Condie, #1 New York Times bestselling author of the Matched trilogy

Praise for ACROSS A STAR-SWEPT SEA: “An imaginative and energetic retelling of The Scarlet Pimpernel-sheer fun!” — Lauren Willig, New York Times bestselling author of the Pink Carnation series

Praise for ACROSS A STAR-SWEPT SEA: “An imaginative and energetic retelling of The Scarlet Pimpernel-sheer fun!” — Cinda Williams Chima,author of the best-selling Seven Realms series

Praise for FOR DARKNESS SHOWS THE STARS: “A richly envisioned portrait of a society in flux, a steely yet vulnerable heroine, and a young man who does some growing up.” — Publishers Weekly

Praise for FOR DARKNESS SHOWS THE STARS: “A post-apocalyptic retelling of Jane Austen’s Persuasion scores high for ingenuity.” — Kirkus Reviews

Praise for FOR DARKNESS SHOWS THE STARS: “Diana Peterfreund’s For Darkness Shows the Stars is an impassioned ode to Jane Austen, love, and the hope found in stars.” — Beth Revis, New York Times bestselling author of Across the Universe and A Million Suns

Praise for FOR DARKNESS SHOWS THE STARS: “Don’t you love it when a brilliant idea meets with brilliant execution? Thank you, Diana Peterfreund for giving us a post-apocalyptic Persuasion. This book is meltingly good.” — Laini Taylor, National Book Award Finalist for Lips Touch: Three Times

Praise for FOR DARKNESS SHOWS THE STARS: “A beautiful, epic love story you won’t be able to put down!” — Simone Elkeles, New York Times bestselling author of the Perfect Chemistry series

Praise for FOR DARKNESS SHOWS THE STARS: “A smart and sexy tale of star-crossed love that’s as thought-provoking as it is heartbreaking.” — n Wasserman, author of The Book of Blood and Shadow

Praise for FOR DARKNESS SHOWS THE STARS: “Readers…will hardly have time to catch their breath before each new twist and turn.” — School Library Journal