An issue of global scale
Rumbo al Cosmos Javier Casado is a free downloadable book with vivid stories about space exploration, space science and technology. It is an amazing book and easy to understand. I liked the way it is written, located in time to the participants of the history and examines their role and social events related to technological developments and space exploration. As expected the book has pictures that help to understand better the content, ie very little boredom.
Of course, the book is available in http://javiercasado.host22.com/index_archivos/Page2208.htm