This book was published in the mid 20's, it's a softcover edition of the series "Los Sports", written by Isidro Corbinos. It has 100 pages (including cover and back cover). Written in Spanish it has a Jack Johnson pic on the cover, a very nice full page picture of Jack Dempsey and four pics of famous Jack Johnson's fights. It has some other images explaining how to fight.
Its condition is VG+. If you're interested, please write me a PM. See images at the links
https://drive.google.com/file/d/1ODg...ew?usp=sharing
https://drive.google.com/file/d/1OCg...ew?usp=sharing
https://drive.google.com/file/d/1OCS...ew?usp=sharing
https://drive.google.com/file/d/1O9A...ew?usp=sharing