You can download a copy for free from Project Gutenberg, or stop by the library next week if you'd rather read a paper copy.
From Goodreads: "Holmes and Watson are
faced with their most terrifying case yet. The legend of the devil-beast
that haunts the moors around the Baskerville family's home warns the
descendants of that ancient clan never to venture out in those dark
hours when the power of evil is exalted. Now, the most recent
Baskerville, Sir Charles, is dead and the footprints of a giant hound
have been found near his body. Will the new heir meet the same fate?"
If Hound isn't your cup of tea, but you're interested in book club, stop by on May 1 anyways. Other books and the movie versions of the Book Club pick are fair game for discussion, too, and suggestions for the next book are always welcome!