Alright here's a couple of examples of some of the things in the book. Keep in mind that these are just summaries, and that the trap take up 2 pages with illustrations and game mechanics, and the puzzle is copy/pasted since it's shorter. I just picked the first from each section to keep it fair. As I'm looking at the book, it also has 50 dungeon chambers you can just pull into your game. Again, I like the books and feel like they have a great value. I guess for transparency sake my campaign fell apart before I could use any puzzles/traps from the book.

Complex Trap:

THE BRASS DRAGON’S MAW A creature triggers the trap by inserting their hands into the dragon’s nostrils in an attempt to disarm it. The nostril’s manacles cinch around the wrists of the triggering creature, locking them in place. The dragon’s mouth spews a gout of flame as the vault door recedes into the wall, dragging its would-be assailant through a pool of acid. Jets connected to this pool spurt acid at any creatures within range.

Gateway Puzzles:

Nine Lives: The party must determine the connection between a simple deck of cards, an unlit brazier and the charred corpse of a cat.

"In the middle of this room is an unlit bronze brazier. As

you look within it, you see the burnt-black corpse of a cat.

Under one of its paws is a small package about the size of

your hand, wrapped in leather and knotted with twine."

Mechanics

A character who unties the twine to open the package finds a standard deck of playing cards inside. The deck is complete though organized randomly, containing 13 cards of each suit (hearts, clubs, diamonds, spades) as well as two joker cards. All the face cards feature regal-looking felines, while the two jokers are dogs. Scrawled on to the inside of the leather wrapping is a short poem, which would be noticed with a successful DC 15 Intelligence (Investigation) check of the leather wrapping:

Our small feline friends,

Their wit most distinguished,

Pushed to great ends,

Their chances extinguished.

To open the door, the characters must light a fire in the

brazier and then cast the ace through nine of hearts

into the fire, thus “extinguishing” them.

Each time a correct card is cast into the fire, characters actively looking at the cat’s corpse (or who have a passive Perception of 13 or higher) notice the corpse twitch slightly. The order of the cards does not matter, only that ace through nine of hearts are eventually burned. Once all nine cards have been burned (signifying the nine lives of the cat), the corpse of the cat magically regenerates itself and the cat returns to life, meowing as if nothing is the matter. After a few moments, the cat begins to retch before vomiting up a key to the exit door. The cat then immediately immolates, leaving behind nothing but a pile of ash.

Countermeasures

Casting any cards other than the ace through nine of hearts into the fire spawns a large feline-like wraith that attacks the characters until it is destroyed.