Very well organized and edited book of monsters. Not very many illustrations but the ones there are very well done! Besides, every entry comes with a terse, evocative description - very usable in-game (and much better than any illustration), for it creates in every player a detailed and sometimes horrifying mental image. Great 'theatre of the mind' kind of stuff. All the stats are easily convertible to other game systems, except AC which appears to range from 1 to 100, with 100 being the toughest. With a little thought, this is easily converted as well. A great addition to the completely awesome Malbolge modules! Buy it!