Originally Posted by
Ky Slim
Mandolin for Dummies is an incredible resource. Everything is explained very well and it is also a fun read.
I'm not sure why anyone would suggest complicated extended chords, shapes and even progressions (ii7-V7 etc) when you simply asked about beginning books for learning chords. We must all walk before we run and we must all stand before we walk.
Mark Gunter asked a perfect question: "Have you learned to simply play the chords for any songs you like? That is the starting point!"
You can play "Happy Birthday" with 2 finger G C and D chords.
Good Luck! Matt