Heroes of the Forgotten Kingdoms is a 4th edition Dungeons & Dragons rulebook published in November 2010. It is part of the Essentials line of rulebooks.
“
Exciting new builds and character options for the druid, paladin, ranger, and warlock classes.
This essential supplement for the 4th Edition Dungeons & Dragons Fantasy Roleplaying Game presents exciting new builds for the game’s most popular classes: the druid, the paladin, the ranger, and the warlock. Each class comes with a set of new powers, class features, paragon paths, epic destinies, and more that beginning players can use to build the characters they want to play and experienced players can plunder for existing 4th Edition characters.
In addition to new builds, this book presents expanded information and racial traits for some of the game’s most popular races, including dragonborn, drow, half-elves, half-orcs, and tieflings.”