Enthusiastically five stars.
This book contains detailed information on Irish wild plants, and on plants which are not from Ireland but have become natiiralised, such as mistletoe.
It provides for each plant:
Irish, English and alternative name in Irish dialect, USA, England, and other countries
Scientific name
Folk beliefs and customs
Legends and mythology
Practical and herbal uses
Beautiful and detailed illustrations
Zodiac and planet associations in traditional herbal medicine

While I have no interest whatsoever in planets and astrology, I found the legends and folklore bits very interesting. They extend to Norse and other European traditions.
The real reason why I bought the book, though, was that I had decided to go herb-picking in Connacht.
A tiny bunch of tarassacum (cicorietta selvatica, for Italians) comes as dear as €3 at the market, until you realise that it grows spontaneously pretty much everywhere in Ireland. And everybody knows how obsessed we, people from Rome, are with cicoria as a side dish. So I decided to stop longing for it in silence, and to start picking it for myself. The same can be said for wild garlic, rocket and so on.
This book provides most of the information I need, and it also contains an introduction and a chapter on Aspects of Plant Folklore with early law, themes of plant folklore and plants in place names.
The same guy also wrote a book about trees, one about birds and one about animals, and I think they will soon join the collection... ( )