Alien of the week has been talked about to death regarding the TV shows so I'm curious how people feel about it when it comes to "Alien of the book". When I look at my favorite Trek Novel's (Terok Nor trilogy, A Stitch in Time, A Burning House, Avatar, Left Hand of Destiny etc), they all do not focus on or have some new alien species. When I read those types of books (Like the Mission Gamma quadrilogy), I find I'm not as engaged or interested compared to when I read about existing alien species. I believe the major problem is knowing I'll most likely never read about them again so who cares.