Another book for those of you who read German:
Arne Birkenstock & Eduardo Blumenstock: Salsa, Samba, Santería (comes with a music CD with 19 songs).
This book gives an overview of many types of Latin American music, their history and their countries of origin.
There are chapters about music in Mexico and Central America, in the Andes, in the southern countries of South America, protest and revolutionary songs (Mercedes Sosa, Violeta Parra), Santería, Brasil, Cuba, Salsa, Bolero, Tango and a final chapter with an overview of instruments and rhythm patterns. Very nice book!
You can find it at amazon dot de.