Finding a mystery Sherlock riddle book

Back in 2014, I had a book based off Sherlock Holmes from goodwill and it had a bunch of riddles for you to solve and tells you how Sherlock Holmes figured it out at the end. One of the riddles was that you figured out why someone was a guilty. One person claimed their horse, a mule had a baby so they couldn't have done it. The book said the answer was that it was that person since mules can't have babies. It was also a paperback book.