I got this book as a gift from a friend. I was happy to read it as I had heard about Nicherin Buddhism before, but I had no idea what it was about. Buddhism is a very diverse religion with some types of Buddhism being entirely distinct religions from others aside from the name.
Nicherin Buddhism is named after the 12tch century Japanese monk who created it. The author of the book is one of the founders of Soka Gakkai International (SGI). SGI is a particular "church" of Nicherin Buddhism that was created in Japan at the end of World War 2 and as the name it implies, they have congregations all over the world. If a stranger has ever handed you a card telling you that chanting "Nam Myoho Renge Kyo" ( the title to the Lotus Sutra in Japanese ) it might have been someone from this group.
I wasn't thrilled with the ideas in the book, but to be fair I think it is too early for me to form a conclusive opinion of Nicherin Buddhism or SGI. It took me many years to have the imperfect understanding I have of Theravada Buddhism. I did find the idea of "the ten worlds" interesting. Those worlds being states of human existence where different people perceive the same environment in different ways and have different lives as a result. I was also interested to read that Nicherin when he rolled his own type of Buddhism created rules that he had hoped would help Nicherin Buddhism avoid the faults with organized religion.
I wasn't completely thrilled that the author used "Buddhism" to refer to his particular type of Buddhism, given how extremely diverse the different types are. To be fair, most authors on Buddhism do that. I also don't think he described other types of Buddhism as flatteringly as they deserved. Again, to be fair, if he thought well of those other types he would probably be a member of one of them. The author kept using the phrase that life has unlimited potential, unlimited ____, shortly before restating that the Buddhist idea that life is finite, that people can't have everything they want, etc.
I found the descriptions of "The Ten Worlds" and all of the factors,subfactors, etc to be a bit too long for my tastes. It felt a bit like a Power Point presentation in a meeting. A lot of lists and sublists of items that were to me abstract as a beginner. That made the middle of the book very dull, and harder to get through. If that section was shorter I would write that this book would have been an excellent beginner's guide to the SGI brand of Nicherin Buddhism.
Overall, the book was exceptionally clearly written.