I have a copy of TFT with all the advance add-on stuff. I liked it a lot. My gaming group from the 1980s played it a lot until the new stuff dried-up with the loss of the Metagaming Company. I remember liking the solo-like adventure that created a search for the Holy Grail. I found a copy of...
Brain in a jar
I have to admit to being a DM who likes to use undead too much. This book allows me to use my favorite bad guy: Brain in a jar. The book has four versions from level 4 to level 12! Perfect! Finally this book is half monsters and half pre-made encounters. It is perfect for the DM...