There will be two options for this challenge and you may choose one or both. The first option is to read books featuring a character identified as a loner, outcast, recluse, wallflower, or introvert. This can be the main character (such as Bella from Twilight or Charlie from The Perks of Being a Wallflower) or a secondary one (such as Miss Havisham from Great Expectations or Boo Radley from To Kill a Mockingbird). The second option will be to read works written by writers known to have been loners or recluses. The great poet Emily Dickinson was very much a loner as was author J.D. Salinger, and this link says the ancient Greek playwright Euripides was something of a loner. A biography of such writers may be read as well. For more reading ideas, see the following links:
A Look at Loners in Literature
The Top 10 Loners in Literature
Fictional Loners Books
5 Books About Loners
Why Do We Love Literary Lone Wolves?
You are by no means limited to reading what is suggested in the links. Any books you find that fit the challenge description may be read.
Guidelines for the Challenge