Okay, so I'm doing up reviews of the rest of the Mummy's Mask adventure path books from Paizo Publishing for their Pathfinder game. This path is set in the part of their game world which is a fantasy version of ancient Egypt called Osirion.
This adventure is split into two parts: a sandbox hex crawl, then a huge dungeon. The hex crawl locations were great, lots of variety to keep the players guessing and challenged about what's coming next. Among the encounters are several interesting NPCs who could re-appear in later adventures if you wanted. One possible problem with the hex crawl, typical to all hex crawls, is what to do if the players take it into their heads to go totally in the wrong direction and off the map. I guess that's where the GM's creativity comes in. The big dungeon, which is actually inside of a huge sphinx, is quite a challenge. The encounters in here are also quite varied and will keep the players challenged and entertained (even if they don't survive).
The book also has two extra small encounter areas which can be added to the hex crawl or any adventure. There is a great section on curses to inflict on the PCs, a set of monsters which I actually liked this time, a bit of fiction (part four), and new items. The major NPCs get extensive write-ups in a section at the back, which is very handy for GMs to reskin them for re-use later. The art was excellent, as it has been in the previous three Mummy's Mask books. I'm glad to see them continue applying ancient Egyptian themes successfully in the NPCs and creatures. I have six of Paizo's adventure paths and this one compares very well to the others. Some I buy just for the ideas, but I would actually run this one if I got the chance.
Bottom Line: yes, this was worth the money and I can recommend buying it if you're at all interested.