The book opens with some songwriting basics, which include - covering the different parts that make up songs, certain common chord progressions, and some basic movable chord dictionaries. Where the author spent a considerable amount of time was in finding popular and classic songs that utilize the examples he is talking about. For budding songwriters this is crucial. Practical application of songwriting theory is the greatest benefit for any writer. I like to think I am knowledgeable of song structure, theory. I know many chord positions on the guitar. So while all that stuff was a great general review for me (and he did say some things I hadn’t heard before) my favorite section is still the dictionary of chord progressions (or sequences - as the author likes to call them). There are dozens and dozens of chord progressions listed in Roman Numeral format. After the progressions the author lists many songs that utilize those very same chord progressions.