Wow - the simple concepts here are really powerful and obvious when laid out like this. Loved to see mentions of other things I've learned or am learning about, like the construction of the Pentagon building, Robert Caro's writing of The Power Broker, the Sydney Opera House construction, the Pixar process and then see it broken down into issues of poor estimation, lack of a reference class for estimation, starting too soon and lack of modular small pieces - spending too long in Long Arcs rather than little loops of iteration. This book rang like a bell for me.