This is an excellent product. It is a fantasy adventure with horror themes, appropriate for Dungeons and Dragons and the like. I played through it using Tiny Dungeon 2E rules with an adult and three children.

The most impressive thing about it is the layout. For a GM, it is very easy to navigate. You won't get lost in this book; it's always easy to find what you need.

It looks beautiful, with evocative imagery. It even comes with separate image files you can show your players for particular rooms. (Wish it had a player-view of the outside of the castle without giving away the cavern structure, though!)

The adventure itself packs a lot of narrative in a small number of pages. The castle itself has many reasons to go there, many boss enemies, multiple factions, and so on. You can pick something appropriate for the characters/players, or give them choices. This one supplement can be used for several adventures. It is horrific, so be prepared for blood being drawn from corpses and the like.

I highly recommend this product. Well done!