The Digital Library of Costa Rica (SINABI) includes books related to history, culture, and biographies. Works are mostly in Spanish; a few are bilingual.
http://www.sinabi.go.cr/Biblioteca%20Digital/libros_y_articulos.html
The Blue Book of Costa Rica
Published in 1916, this book contains the history of Costa Rica, including biographical information and photographs. The book is bilingual.
http://www.sinabi.go.cr/Biblioteca%20Digital/libros_y_articulos.html