Walking in France
Sandra Bardwell, Miles Roddis, Gareth McCormack, Jean-Bernard Carillet, Laurence Billiet, Tony Wheeler — authors. Lonely Planet, 2000
Detailed travel guide to hikes ranging from a few hours to several days in 13 regions in France. 25 pages dedicated to Pyrenees, ignores Basque country for some reason.
General travel information for visitors to France who intend to make the most of the fantastic hiking paths.
WorldReader 
About the downside of Pyrenees Hikies — freak spring snowstorm.
http://www.telegraphco.uk/news/uknews/1548148/Millionaire-pilgrim-killed-by-snowstorm-Pyrenees.html
UNESCO protection – cultural landmark
Click to access 11218587105Spain.pdf