darth_ender said:

I've always enjoyed Trek, but my interest in it waxes and wanes: it's always something I like, just not always something I think about. But I definitely have recently had a resurgence of interest. Phase II in particular is extremely interesting to me. I'll have to check out all these books you're recommending, as they sound so very interesting. Also I'm curious about Planet of the Titans, but I know very little about that or where to research further Beyond Memory Alpha.

Trek: The Lost Years, and The Phase II book both have outlines and background information on "Planet of the Titans". It's most defiantly focused on in these books. But at the moment I forget what book has what information about it. There is the reprinted original story treatment as far as I can remember. I'm in Hawai'i at the moment, but as soon as I return home I can let you know more information about what each book contains on that subject.