For books on the Apple and Amazon platforms, there is now a page on Booklinker with links to the Apple Book Store and Amazon Book Store. The links are universal and will direct you to the store in your country.
Link for Apple: Booklinker – Mountaineering Methodology
Link for Kindle Fire: Booklinker – Mountaineering Methodology
Link for Kindle e-ink: Booklinker – Mountaineering Methodology