Shape Up

This is a good book on how a practitioner should run a product based agile team. Even though it heavily emphasizes their own tools and partly comes off as marketing material for base camp, the lessons here are widely applicable. There are some interesting techniques here which agile teams should think about from running larger 6-week sprint sizes to how scope discovery and task confidence builds during project. The best part is that this is a free book and a fast read.

Enlightening, even though I was already familiar with the concepts. The book presents a set of mental tools and explains their benefits. Armed with those, I feel much more confident in defining and bringing projects to life. This approach makes a lot of sense in theory—I aim to try it for myself in the near future.

There were some good ideas here, but I think this could have been a series of blog posts rather than a book. I've found this to be the case with a few other 37Signals books I've read, if you read the blog you basically have the content of the book.
I think I'm just not a huge fan of business books, they prescribe trite solutions to complex problems, and if their being honest they tend to dilute said trite solutions with so many caveats that the advice becomes generic.
Two stars because, I do think there are some interesting ideas and this this book is just nebulous enough that said ideas can be applied to almost any team or small organization.