Amazon.com Price: $16.62
(Note: I have read the french version of this book)
Despite the fact that this book as some information about the GR20 (with explicit mention in both the foreward and introduction section), it does not cover the GR20 has one may expect. Bits of trails are mentionned here and there, no chronological information regarding GR20 steps, and so on. Besides, the index is so badly put in place that I could not find information about crucial GR20 point of interest (Calinzana - Ortu di u Piobbu? Cirque de la Solitude? Ascu Stagnu? ...)
This book may be good for the one looking for day hike with no particular multiday backpacking in mind but I would not recommend this book for the one planning for the GR20, mare a mare, or mare a monti.
It is worth to mention that this book contains very nice pictures unseen anywhere else (actually took by the author) which gives a nice impression about the flora and fauna, mountains, and such.
