There are many books that claim they can be life-changing for the reader; there are far fewer that are. This falls into the latter category, IF you are prepared to put in the work. Each chapter ends with "Stem Sentences" for you to complete an contemplate. For example, the first such sentence at the end of the first chapter reads: "Lightbearers in my life include..." and you are invited to name all those who have bought Light into your life.
One of my favourite quotes from the beginning of the book reads:
"You know, you don't have to be so concerned about understanding whether something is or is not so. All you really need to know is whether it works and if it does, how to work it. In fact, 'what is' and 'what works' are really much better definitions of Truth than so called factual accuracy." I found that well worth pondering.
Just a note - the authors are keen to make a difference between spirituality, which this book is about, and religion, which it most certainly is not, at least not in the religion as an institution sense of the words.
Get it, read it, do the exercise and I'm sure you'll come to appreciate it as much as I have.