Andrew Collins - Alternative History
An investigation into the many myths surrounding Angels, Watchers, Niphilim and other "advanced beings". Interesting and well-written, as with all of these things, it's best to draw your own conclusions as to what these mythological entities really represent. Draws heavily from Judaic, Persian and Zoroastrian sources. Recommended

Curiously addictive, but I can't say I really had all that much fun with it...