There are a number of books available for further reading. The following are all in their own right, very good introductions to this buddhism:
(Books by SGI International President, Daisaku Ikeda here >>>)

A good and easy to understand introduction to the Buddhism of
Nichiren Daishonin with a foreward by Jazz Musician Herbie
Hancock.
You can buy it online at Amazon.co.uk or Amazon.com.

A fascinating book written by an academic who is not a memebr of SGI. Though he is an academic, the writing flows as he relates his experiences during the research into this book with the loss of his wife and his feelings around this. He looks into the history and globalisation of a dynamic Buddhist Organisation.
You can buy it online at Amazon.co.uk
No personal review as I haven't yet read this book, but this is what amazon.com say:
Five years ago, journalist and practicing Buddhist Woody Hochswender co-authored a book on Buddhism that focused on the teachings of Nichiren, a 13th-century Japanese monk who has become the spiritual teacher for more than 20 million Buddhists worldwide. That book, which is in its 10th printing and has sold more than 80,000 copies, was such a resounding success that Hochswender has written an insightful new work—at once a follow-up to the previous volume and a freestanding work of its own. A new breath of inspiration, The Buddha in Your Rearview Mirror speaks to the spiritual yearnings so many of us have amid the hustle and flux of contemporary life.
The book is a sophisticated but accessible introduction to Buddhism as well as an in-depth study of Buddhism in the Samurai period. Hochswender again focuses on the philosophy of Nichiren and applies its principles to everyday issues ranging from health to careers to family problems. The Buddha in Your Rearview Mirror is both cogent and compelling—informative history and inspiring self-help. Ideal for the novice or veteran Buddhist, the book will resonate with anyone interested in concrete methods for tapping into their own highest potential or enlightened self.
You can buy it online at: Amazon.co.uk or Amazon.com

A highly entertaining and personal experience of this Buddhism written by an American who has practised for 15 years. With chapter titles such as 'Teenagers are Aliens' this humourous author offers a gentle but useful introduction
You can buy it online at Amazon.co.uk or Amazon.com

First published in 1988, this book was written by the former
Director General of SGI-UK. It is a well written and intelligent
book which probably goes deeper than 'The Buddha in Your Mirror'
but is never the less an enjoyable and informative read.
You can buy it online at Amazon.co.uk or Amazon.com

Synopsis follows - Ed is having a hard time - at work, in his love life and, well, generally. Then he meets an unlikely Buddhist - who drinks and smokes and talks his kind of language. Bit by bit, things begin to change... Ed doesn't always take Geoff's advice. Or, when he does he lapses at the crucial moment. His path to understanding is not a straight one, especially as life keeps throwing more and more 'stuff' at him. Often he fails - like most of us, in fact. But sometimes he manages to get it right. And when he does, surprising things begin to happen ... In The Buddha, Geoff and Me Edward Canfor-Dumas brings all his skills to bear in an absorbing story of everyday city life, where the characters stand out with all their human strengths and weaknesses, and the ending brings Ed - and perhaps all of us? - a hope we didn't necessarily expect. The Buddha, Geoff and Me - for anyone who's ever begun to wonder what the whole damn thing is all about.
Buy this book from
Amazon.co.uk or Amazon.com

