Themes: Life Lessons, Values, Identity, Justice, Treasure Hunting, History, Mystery, Fiction, Teen, Young Adult, Hi-Lo, Hi-Lo Books, Hi-Lo Solutions, High-Low Books, Hi-Low Books, ELL, EL, ESL, Struggling Learner, Struggling Reader, Special Education, SPED, Newcomers, Reading, Learning, Education, Educational, Educational Books. Leo sets out to teach his sister, Toby, that there are lessons to be learned by exploring the past. Little did they know that would stumble upon the answer to an old mystery. Just 32-pages each—eBooks for struggling readers power-packed with reading employment. Here are 40 exciting Hi-Lo books with various themes guaranteed to keep your students turning the pages until the very end!