This document is a collection of adventures, dungeons, places and information about a Pathfinder campaign called Imarand, the twin worlds. I have been running and developing this campaign since I first got the chance to be a dungeon master for my Dungeons & Dragons/Pathfinder group. I still run the game for my friends on a regular basis. This setting originally started out as a 3rd edition campaign, covering only a small area with a makeshift map, but with the release of the 4th edition of Dungeons & Dragons I revised the world, expanded the lore and began adding new races, feats and abilities to the game. However, 4th edition wasn't right for the type of game I wanted to play, so when I came across Pathfinder RPG, I yet again adopted new rules and, from that point on, the setting expanded rapidly. New kingdoms and city states were born, and new races and creatures filled the lands. Now, I have finally collected everything I have in this source book, hoping that it can be used by other players and game masters.