ebooks are available on all platforms: Kindle, Apple, Smashwords, Kobo etc

The cheapest way to buy my paper back books is to do an internet search, eg

Best price books by Lyn Behan

Try Blackwell’s, Waterstone, Amazon and Australian bookshops.

Blackwell’s UK have free postage to Europe and Australia and charge in your currency.

Or ask at your local book store by quoting the ISBN for a paperback