Publisher's blurb:
Dungeon Masters rejoice and players beware!
...
The Total Party Kill Handbook will help you take your game to the next level of challenge and fun with 25 encounters, built for groups from level 1 to level 20, all designed to be dropped right into your existing campaign with minimal prep.
Every encounter can be scaled up or down to fit groups that are several levels higher or lower, and the tactics scaling sections let you make the monsters smarter or dumber to further tweak the difficulty to match your party. With an index that organizes encounters by level, where they take place, and which monsters appear in them, you can find the next challenge for your group in seconds.
Within you’ll also find the Trap Workshop, a revolutionary trap creation system that will let you build traps that damage, disable, and debilitate adventurers, making your dungeons even more dangerous. If you wish the Dungeon Master's Guide had better rules for creating traps, you won't be disappointed here.
You tell the story, this book provides the numbers.