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After defeating The Hisser - and discovering their power as a team - Infinity Trinity is ready for its next adventure. When Akiko, Mae, and Josie learn that a spy has been betraying secrets to the Japanese military, they join Room Twelve in San Francisco for important work with other code-cracking experts. But soon there is personal code to crack: Akiko spots her mom walking with the suspected spy through San Francisco, which had been her family's home until Executive Order No. 9066 sent Akiko and all Japanese Americans on the West Coast into internment camps. Teaming up with brilliant members of The League of Secret Heroes - like real-life World War II code-crackers Genevieve Grotjan and Elizebeth Friedman - Akiko, Mae, and Josie search for answers as they battle the evil clown Side-Splitter, who's bent on destroying not only the city, but the Infinity Trinity, too.



About the Author

Kate Hannigan

Chicago children's author Kate Hannigan writes fiction and nonfiction for young readers. A former newspaper journalist, she loves listening to people's stories and digging deep into research. Her newest titles are the nonfiction graphic novel THE GREAT CHICAGO FIRE: RISING FROM THE ASHES (First Second) and THE LEAGUE OF SECRET HEROES series (Simon & Schuster/Aladdin) , a historical fantasy featuring three comic-book loving kids who discover they have superpowers and team up with remarkable women from World War II who were doing their own heroic deeds - the first computer programmers, code-crackers, WASP pilots, and spies. CAPE, Book 1 in the series has the young heroes teaming up with the real-life ENIAC Six mathematicians who programmed the computer that launched the modern technology age. It received the 2020 Oklahoma Book Award and was a 2019 Parents' Choice Foundation Recommended Award Winner. MASK, Book 2, includes brilliant real-life code-crackers Elizebeth Friedman and Genevieve Grotjan, as well as heroic spy Noor Khan. And BOOTS, Book 3, features trail-blazing women pilots like Willa Brown, Janet Harmon, Jacqueline Cochran, and WASP Jane Doyle, who Kate was lucky enough to interview when she was 96!Kate enjoys visiting classrooms, whether in-person or on-screen. Go to KateHannigan.com to book for your school.Kate's history-mystery novel THE DETECTIVE'S ASSISTANT (Little, Brown Books for Young Readers) received the 2016 Golden Kite Award for best fiction from the SCBWI, was a 2019 California Young Reader Medal nominee, and was a Booklist Editor's Choice pick for 2015, a Chicago Public Library "Best of the Best" book, Bank Street College's 2016 Best Books, winner of a 2015 Nerdy Book Award from the Nerdy Book Club, Amelia Bloomer Project 2016 List, as well as A Mighty Girl's "Top Pick for Tweens and Teens." Kate's books have been placed on the Illinois Reading Council's "Illinois READS" state lists for multiple years. THE DETECTIVE'S ASSISTANT also made the State of Maryland's Black-Eyed Susan Book Award list and was the Spring 2018 NIU Steam selection for Northern Illinois University.Kate's nonfiction picture book biography A LADY HAS THE FLOOR: Belva Lockwood Speaks Out for Women's Rights (Boyds Mills Press) received a Society of Midland Authors honor, was named to Chicago Public Library's "Best of the Best" list, a Rhode Island Book Award nominee, A Mighty Girl Best of 2018 selection, a Junior Library Guild Selection, and earned four starred reviews. Her three-book CUPCAKE COUSINS series (Disney-Hyperion) was also names to the Illinois READS list and CPL's "Best of the Best."Visit Kate online at KateHannigan.com.



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