I've read (and own) a copy of probably every book on Jai Alai written in English over the last 35 years or so and have to say it's between Goitia's excellent book and the unpublished manuscript by Elu, with Goitia's book a narrow winner because of better technical writing, but Elu's book was sooooo interesting! We also have to consider Sensei's manuscript as well, but Goitia wins by a nose in a photo!