The third jet-setting installment in the thrilling award-winning chapter book series Secret Agents Jack and Max Stalwart, by Elizabeth Singer Hunt (Secret Agent Jack Stalwart). Now Jack teams up with his older brother Max to solve an intriguing Irish mystery, using their special training as secret agents. Ireland's greatest national treasure, the sacred Book of Kells, vanishes from a library in Dublin. Clues point to the Mastermind being involved. Will Jack and Max be able to find the Book and uncover the Mastermind's identity before he strikes again? Praise for the new series: "A handselling favorite as well as a go-to choice in schools for reluctant readers."― Publishers Weekly Praise for the original series: "Extremely exciting." ― The Guardian "Informative, action-packed, and great fun." ― The Children's Book Review Elizabeth Singer Hunt is no stranger to the world of espionage. She's the granddaughter of a former spy and author of the award-winning Secret Agent Jack Stalwart chapter book series. The series has been named a "must read" for boys by the British Education Secretary, serialized by BBC Radio, and developed into an animated TV show. She's also the creator of the Secret Agents Jack and Max Stalwart chapter book series, The Secret Agent Training Manual , and The Secret Agent Jack Stalwart iPad app.