These Kundalini books are not related to Yogi Bhajans’ Kundalini Yoga or any of it’s affiliates.
These books are an autobiographical account of one man’s spontaneous Kundalini awakening and his journey to contextualise and understand the magnitude of a spiritual awakening that resulted in Kundalini rising.
They are a part of the ‘What on Earth is Kundalini?’ series developed by omdevaji since 1998.
You can join the ‘What on Earth is Kundalini?’ group on Facebook for free via this link https://www.facebook.com/groups/WhatonEarthisKundalini
You can Subscribe to the YouTube channel free of charge for access to 500+ videos explaining Kundalini and everyday psychology in relation to the deepest Yogic Philosophy, Physiology and Practices via the link 

The “What on Earth is Kundalini?” Series

What on Earth is Kundalini Series Summary

What on Earth Guarantee

The What on Earth is Kundalini series Book One Summary

The What on Earth is Kundalini series Book Two Summary

The What on Earth is Kundalini series Book Three Summary

The What on Earth is Kundalini series Book Four Summary