A reasonably clear introduction and explanation of git. The first part does a good job at explaining things for new users, and is especially good at pointing out saner ways to do things that were added in recent versions of git. It seemed to cover most of the stuff I've learned the hard way, and I found one or two new things. The only glaring omission is it didn't seem to cover git reset at all.

The chapter on managing a project with git covered problems I'm just starting to encounter, so was appreciated. The section on subprojects showed all their many warts; candor appreciated. The coverage of subtree merging was entirely new to me and very interesting to see. The final chapter on internals does a good job of really getting down and dirty at both the git database and wire protocol levels.

The only things I didn't like were some slightly shady bits of sysadmin advice. In at least two places the user is advised to set up things in an insecure way. (I hope to get these corrected.) In other places the user is walked through cloning a project from git and manually installing it -- even though apt-get is used to install other things on sometimes the same page.