I wanted to share a quick link that I discovered when I took up the Star Trek books. Someone created a flowchart of the covers for most of the post Nemesis books. It was the first site I found outside of Memory Beta and I still find it useful today. Its a little slow to update, but he always gets around to it.
Its not nearly as Comprehensive as Thawn's, but I thought newbie readers (like myself) might like to check it out!