Super-critical Professor Walter Dudley should have retired long ago. Everyone hates his history class. But even his unhappiest students wouldn't have done him any harm ... or would they? Tony Young resolves to find out what really happened to the cranky old man. Written specifically for struggling readers to explore genres, like mysteries and science fiction, these fast-paced books hold student interest until the last page. Questions at the end of each title promote cognitive development by making students think about vocabulary, comprehension, character, and plot.