I bought this book a week or two ago, partly because it says, in the subtitle, that it is an AUTHORITATIVE guide, and partly because of the positive reviews above.
However, it is mostly a picture book - which is fine if that is what you are looking for - but the text for many of the Saints is not enough to be a guide to their "life and works" eg There are just 7 sentences about Elizabeth (Isabella) of Portugal - who is known as The Patroness of Peace because of her work of reconciliation - including "Although she wished to live in modest obscurity, she was called upon to soothe the poor relations between Portugal and Castile" - not what I expected from an "Authoritative Guide...with Expert Commentary"
And for dozens of Saints we are offered just one or two sentences. eg "Peter Chanel: an early member of the Society of Mary, he was sent as a missionary to the French territory of Fortuna, where he was martyred".
"Jane Frances de Chantal: Founded the Visitation Order. By the time she died, 86 convents had been established in Europe".
There are also mistakes - eg St Rita of Cascia had a violent husband and unhappy marriage. Modern scholars say that this is not true, and that the original error arose from a mistranslation.
The best thing about this book, for me, is that it does have some brief entries on the some of the more recently canonised Saints. But had I been able to browse through this book first, I would not have bought it.