Tomb of Horrors Complete is the new monster book from Frog God. The physical copy is going to be huge - I just got my PDF copy of the Swords & Wizardry version (it also comes in a Pathfinder flavor).
First, this is a huge PDF - solidly over 200 MB, so don't download this if you are using a hotspot / mobile device with a monthly cap - grab it when you are home.
The main thing that got my attention is that every page (at least the ones I've looked at so far - it is close to 700 pages in length) has one or two creatures and a short plot hook in which to use them. The plot hooks are pure awesome even if you don't use as written, as they are a great tool to get one's creative juices flowing.
The art is quality so far. I would't mind the option of buying some original pieces (or signed prints) to frame and hang on the wall. Maybe the Frog God can pass the word on to the artists.
Really like what I see so far.