Share this Page Jan De Groot 0 Total Resources 1 Books Books by Jan De Groot 1 Sort by Number of Resources Number of Awards Book Title Year Published Word Count Reading Level: ATOS® Reading Level: Lexile® Add Multiple Titles to Reading List Browse books by Jan De Groot A Boy in War by Jan De Groot 2 Resources Add to Reading List Share this Book Images courtesy of publishers, organizations, and sometimes their Twitter handles.