The complete Sherlock Holmes, book 1.
The first 5 novels and collections.
Finished the first one, A Study in Scarlet. It's about how Watson (the books are all written from Watson's point of view) first shares a room with Holmes and discovers his love of detective work, and then Holmes does his first major case.
The novel was good at first but the entire second half was a backstory for the murders and murderer, and just dragged on forever. It was set in Utah with the Mormons settling Salt Lake City and mormons being mormons. And Brigham Young. Some guy falls in love with a girl, but the girl is forced into a polygamous marriage by one of the elder families. Guy goes on campaign of revenge. They could have told this entire story in one chapter but I think Doyle was paid by the word... or maybe the letter. I also think Doyle had a hate-on for mormons.
Hopefully the second novel isn't as tedious. I know most of the stories he wrote were short stories, easier to digest.