For me, it was about healing the problem that was derailing self-worth, and/or self-esteem, and that book turned out to be Dr. Berceli's first book, "The (R)evolutionary Trauma Release Method."
It points to the process in the body that evolution built in us, and what makes it revolutionary is it can heal trauma without the need to talk about it. It reduces the time for therapy significantly, in my experience.
What I experienced was that the root of self-development is stifled by trauma, especially childhood developmental trauma. It mucks up attachment, attunement, trust, self-regulation, and introduces shame. By the time we get around to love and sex as human experiences, well, I'm sure you can see where that goes.
It put to rest the need for affirmations, which is essentially telling yourself propaganda until you believe it, and for way too many, does't work for that reason. It put to rest "fake it until you make it," "no pain, no gain," "my trauma made me stronger," and several other myths.
It made authenticity and agency real. It re-establishes the attachment and attunement that was missing, and the rest falls into place with choices that are now possibly and healthy because of the neurophysiological capacity and resilience that develop.
However, that does not happen in the context of "self." Humans from inception are obviously meant to be interdependent - co-regulating is the psychological term. We need someone else for attachment and attunement, and in the therapeutic setting, even a somatic one like Berceli created, the client/provider relationship is the context of the starting point. What makes that possible is a provider who has truly done their own work, not bypassed it.
If you want to heal the body, emotions, cognition, relationships, and belief systems, start with Berceli. Then become your own Thunderbolt Kid.