This book was supposed to be published in 2010, but never materialised. Here is the blurb that RPG Geek has:
Does anyone know what went on here?Freeport Companion 4e at RPG Geek wrote:Avast ye scurvy dogs and prepare your game to be boarded by the Freeport Companion compatible with the 4th Edition of Dungeons & Dragons! Complementing the Pirate's Guide to Freeport published by Green Ronin in 2007, this 176 paged tome will make Freeport accessible for 4e campaigns, complete with races, the corsair class, equipment, monsters, an insanity system, magic items and rituals, notable Freeport characters, and an introductory adventure.
How far did the project go? Did Green Ronin get blocked from using 4e for legal (GSL) related reasons? Did it overrun? Was it a failed Kickstarter bid?