If you want to write in a genre, you have to read that genre. Experts in the industry are consistent with their advice that you must be an avid reader of a genre to write well in it. The books below should give you a feel for the genre, both current and historically, but be sure to read the alien invasion books that are selling now, especially the indie ones. A read through of a few of the books in the Amazon Top 100 should let you know what readers are buying.
Making a Living as an Independent Author