Microsoft isn't quite ready to confirm the existence of Forza Motorsport 3, despite leaks and teases to the contrary, but some retailers are already saving a spot for it with an estimated Fall release.
The latest non-confirmation of an impending Forza 3 comes from the German version of Amazon, with the online retailer listing the Forza Motorsport 3: Prima's Official Game Guide for a September 30th release. Typically, those books tend to ship just prior to the game hitting stores, so an October release (in Germany, at least) could be likely.
Yes, that's not exactly hard evidence of the third Forza Motorsport landing later this year, but one more potential tiny leak that may turn into a torrent of confirmation at next month's E3.
Forza Motorsport 3: Prima's Official Game Guide [Amazon.de via VG247]