One Is The Loneliest Number by Three Dog Night

Want to write better chord progressions and melodies?

Hooktheory’s best-selling how-to books, Hooktheory I and Hooktheory II, will concretely teach you how to craft melodies and chord progressions like professional musicians, and gain a deep understanding and intuition for how music works.

Hooktheory I and Hooktheory II are designed for songwriters, producers, instrumentalists, and music makers at all skill levels. They don’t require any previous music knowledge or the ability to read music

Available for Web, iOS, iBooks, and Android.