The full name is "Origin's Official Guide to Crusader - No Regret" and it was published by Prima (the guide to the first game was published by Origin itself I believe). The ISBN code is 0761509259.
The book roughly follows the same setup as the No Remorse guide. It has a section on game mechanics and detailed descriptions and statistics for items, weapons, human foes and mechs. Then it has the maps for all missions. But in contrast to the No Remorse guide, only the important things are highlighted (No Remorse used to highlight everything, including every single camera for example, the writers thought this might be too confusing for the reader though and I kinda agree with them). The last section has a detailed walk through for each mission.
Unlike the No Remorse guide there is no background lore or art gallery included. It does however has five pages of "Crusader 2 Art Preview", but it wasn't really impressive. I guess the guide was a bit of a let down as far as lore was concerned (the No Remorse guide had quite a bit of back ground stuff) but it shines where it is supposed to shine...being a game guide.