These are in-depth Spanish language biographies of the Alice Cooper Group years by Spanish fan Sergio Martos. The first, 'Por Un Billion De Dolares', was published by 66 RPM Editions in 2013 covers the early band years, while the second, 'Bienvenidos A Su Pesadilla', released in 2018 covers the solo years from 1975-2017 and features contributions from Dick Wagner, Kane Roberts, Bob Marlette, Chuck Garric, Ryan Roxie, Damon Johnson, Mike Pinera and many more.
Unfortunately no English translations are available, so it's very hard for me to judge the accuracy of either book. However I do know Sergio and he's a huge Cooper fan. He knows his stuff, and used this site in writing his books, so have little doubt that if you can read Spanish these are essential books to read. They do look very nice and comprehensive!