The practices in this book are genuinely good and worth thinking about. The presentation format - essentially a long list of advice - could use some work.
Some good quotes:
Agile development uses feedback to make constant adjustments in a highly collaborative environment.
Software development doesn’t happen in a chart, an IDE, or a design tool; it happens in your head.
No plan survives contact with the enemy. - Helmuth von Moltke
As U.S. President Eisenhower said, “The plan is worthless. The planning is essential.”
You can’t freeze requirements any more than you can freeze markets, competition, learning, evolution, or growth.