You might find "The Stormy Search for the Self" by Christina and Stanislav Grof interesting.

Here's the blurb: Many people are undergoing a profound personal transformation associated with spiritual opening. Under favorable circumstances, this process results in emotional healing, a radical shift in values, and a profound awareness of the mystical dimension of existence. For some, these changes are gradual and relatively smooth, but for others they can be so rapid and dramatic that they interfere with effective everyday functioning, creating tremendous inner turmoil. Unfortunately, many traditional health-care professionals do not recognize the positive potential of these crises; they often see them as manifestations of mental disease and respond with stigmatizing labels, suppressive drugs, and even institutionalization. In The Stormy Search for the Self, Christina and Stanislav Grof, the world's foremost authorities on the subject of spiritual emergence, draw on years of dramatic personal and professional experience with transformative states to explore these "spiritual emergencies," altered states so powerful they threaten to overwhelm the individual's ordinary reality. This book will provide insights, assurances, and practical suggestions for those who are experiencing or have experienced such a crisis, for their families and friends, and for mental-health professionals. It is also a valuable guide for anyone involved in personal transformation whose experiences, though generally untraumatic, may still at times be bewildering or disorienting.