If I was only reviewing page 42 of this book it would get 5 Stars. It’s a list of song chords for each key, apparently initially developed to allow you to work out the chords in a song you are listening to. It’s really useful for exploring other areas to take the harmony in a song. The table starts with the usual harmonic scale chords but adds in another half dozen that can work but you might not have though of.
My second favourite part of the book is a large section on song sequences. Rikky takes sequence e.g I-III-IV-V: (in Am this is Am-C-Dm-Em) and then gives lots of examples where it is used. For this sequence the list includes Elvis Costello “I want you”.
There are also good sections on song structures, key changing and melody. Most of the rest of the book is chord diagrams, a pity since most guitarists will already have those.

Best Bit  Page 42 Song Chords table