Five books that are the first in their respective genres

Jeff Somers is the author of Lifers, the Avery Cates series from Orbit Books, Chum from Tyrus Books, and We Are Not Good People from Pocket/Gallery. He has published over thirty short stories as well.

At B & N Reads Somers tagged five books that are arguably the first in their respective genres. The book that marks the start of the YA novel:Little Women, by Louisa May Alcott

It seems strange