If you're looking for a good read, this graphic plots all of fiction's main genres and some of the best books in each one.
This massive plotting of fiction genres from Pop Chart Lab covers all the classics. Start with a big genre and follow the lines to more niche genres. Each one will have at least two very popular classic fiction books listed for each.
Interested in some true crime mystery? Try Truman Capote's In Cold Blood. Or maybe you're looking to get scared? Check out H.P. Lovecraft's At the Mountains of Madness. Whatever you're into, you'll be able to find at least one good book to read in there. If you really like it, you can even buy the poster from Pop Chart Lab's online store at the link below.