For those who haven't read the Halo books it may be news that Master Chief had a horrible childhood. In this the latest trailer from Halo 4 we're given a peek into his abduction and the experiments he was subjected to until he was finally a Spartan. The trailer also gives us a peak at the new foes Master Chief will be facing in Halo 4.
In other Halo related news, the final book in Greg Bear's Forerunner trilogy - Silentium - has been delayed and won't see release until March 2013 (previously pinned for release this January).