Thunder and Mercy

★ “Set in 1979, the novel captures the freewheeling feel of a Philadelphia summer while weaving in high-stakes Revolutionary War espionage. Thunder is prickly but compelling, determined to prove herself apart from her science-obsessed parents by solving a centuries-old puzzle. Charlie, an earnest eight-year-old with meteorological aspirations and a permanent tie, and his sweet but struggling sister Heather, round out this trio of latchkey sleuths who will inspire readers to form puzzle-solving crews of their own. Barr moves confidently between eras, blending historical fiction with brisk, thrillerlike momentum. The result is an immersive adventure filled with coded messages, spy lore, and the ache of growing up with largely absent parents… A must-purchase for middle grade collections. A lively, genre-blending mystery that will appeal to readers who enjoy historical intrigue, clever puzzles, and a strong-willed heroine.“—School Library Journal, starred review

“This novel is that killer combination of a dazzling plot with characters who are rich and real and unforgettable.”—Lynda Mullaly Hunt, New York Times best-selling author of Fish in a Tree

“Barr’s Thunder and Mercy brilliantly draws young readers into the past through a clever and relatable main character whose voice feels fresh and alive. What makes it stand out is the way it balances that energy with meticulous attention to historical detail—small, surprising touches that deepen the story and bring its world vividly to life. It’s both engaging and richly grounded, a combination that will spark curiosity and open new doors to history for young audiences.”—Justina Barrett, chief learning and engagement officer, Historical Society of Pennsylvania, and former site manager for Mount Pleasant

Jennifer Robin Barr grew up in the Philadelphia area during the 1970s and ‘80s, spending her summers immersed in imaginative play with neighborhood friends, whether diving into games like home free or acting out scenes from Charlie’s Angels. Her writing focuses on weaving fictional stories around historical events, especially those lesser-known stories from Philadelphia’s past. She finds inspiration in the city’s historic neighborhoods and old cemeteries. Jennifer’s debut novel, Goodbye, Mr. Spalding, was named a 2019 Booklist Top 10 Sports Book for Youth.

This item is eligible for free returns within 30 days of delivery. See our returns policy for further details.