This book was published by David C. Cook and was released in the United States in September 2009.

The book is divided up into seven chapters, containing a foreword and an afterword, all intended to help deepen readers' understanding of the Holy Spirit.

A follow-up to the message of Crazy Love, Francis Chan offers an invitation to understand, embrace, and follow the Holy Spirit’s guidance in our lives.

[2] Publishers Weekly reviewed Forgotten God saying that Francis Chan "passionately pleads with the church to live by the power of the Holy Spirit," but that it lacks depth in most Bible references.

Chan has given all royalties from Crazy Love to help children trapped in sex trafficking.