idel Castro: Biografía a dos voces (Spanish Edition) https://www.amazon.com/gp/product/0307376532/102-5175570-2350561?v=glance&n=283155Fidel also wrotes some books, a lot of speeches, and specially, between 2006 and 2016, a good number of "Reflections", articles or comments published in the cuban press.
Cien Horas con Fidel / One hundred hours with Fidel
https://www.amazon.com/gp/product/0307376532/102-5175570-2350561?v=glance&n=283155
Or you could check Ocean sur website !!