The release dates for Fringe prequel novels 2 and 3 have been pushed back from their originally announced dates.
The Dunhamnator-focused “The Burning Man” is now due out in all universes on August 6, 2013. [pre-ordering available]
Again according to Amazon, the Peter-centric novel “Sins of the Father” now has a release date of November 5, 2013. [pre-ordering available]
Fringe prequel #1, the Walter-centered “The Zodiac Paradox” is available now. (Amazon link).