This book is getting huge promotion efforts, with presentations all over the Spanish geography, which are typically accompanied by a concert from a varying group led by Ignasi Terraza (natural inheritor of Tete Montoliu's piano tradition in Spain) and Horacio Fumero (longtime bassist in Tete's trio).
My viewpoint, in a nutshell: it IS a nice book, though NOT a great book (in terms of documentation, original research and comprehensiveness).