: I've only played through that part and seen that cutscene once, so I don't
: remember everything.
: So, where was the Slipspace rift from? I was wondering if he fell in the path
: of the Composer and been composted. Er, composed. Somehow, the idea of a
: digitized Didact is frightening to me.

: As for the guide: I like the sample pages very much. Some of the similar Halo
: information books have really disappointed me with inconsistent
: information and ugly recycled images. However, DK is such a great company;
: I have high hopes for this book.

It seems to be part of the mechanism that the Composer was inserted into on the Didact's ship. When you leap over, Cortana says there's a slipspace rupture opening under the Composer. When you arrive, you can see the swirling vortex of energy below, and that's what the Didact eventually falls into.

Yes, the sample pages are good, but on subjects we already know a good deal about so not surprising not much new in them. There will be some good info in some of the obscure subjects if the last guide is any indication. The format is similar.