Proline Guitar Chords Plus Book

Guitar Chords Plus gives you a comprehensive study of guitar chords (normal and extended), tunings, keys, transposing, and the capo. The book includes informative and clear photos, diagrams and instructions, and addresses the questions:
Are there really thousands of guitar chords? Which chords are important to the beginner? Must you learn all the different ways to play a C chord?
If a song seems too difficult to play, can you make it easier by changing the key?
Is a capo worth the trouble? 88 pages.