We are working hard to find a way to offer eBooks and Audiobooks for as many titles as possible.
Unfortunately (and somewhat surprsingly) the cost associated with providing an eBook and Audiobook is the main factor why we haven't been able to roll out a full selection of formats for many titles. They are simply much more expensive than paperbacks. If you are not asked to choose between formats on the product page, then the only available format will be paperback.
If, for whatever reason, receiving a paperback would make its content inaccessible to you then please reach out to our customer support team who will do their best to get you an Audiobook version of the book.
If you choose the Audible format then we will send an Audible gift to your email. You must have an Audible account in the UK, USA, Canada, Australia, Germany, Italy, or Spain to redeem this gift. When checking out your address must be in the same country/region as your Audible account to make sure that you can redeem your gift.