The time machine and other cases Einstein anderson series, book 4

Summary: People are happy to share puzzles and riddles with Adam "Einstein" Anderson. Sometimes they need his help and sometimes they are trying to outsmart him. In any case, he enjoys the challenge-and is always ready with some awful jokes that make people groan. Margaret, Einstein's best friend, tries harder than anyone to fool him. She shows Einstein some footprints in the mud and says a big, growling creature scared her the other night. Could Margaret be telling the truth, or does Einstein know she's only kidding? And there are other mysteries to solve. For instance, what does Einstein think about the time machine his friend Stanley believes in? Science has never been more fun than in this series by author Seymour Simon. The ten stories in this book are full of smarts and laughs. Narrator Johnny Heller wonderfully captures both the knowledge and humor of Einstein.