Designing Data-Intensive Applications is available from your favorite bookstore.
Here are a few suggestions. Sure, Amazon is convenient, but why not support your local bookshop? They probably won’t have the book in stock (it’s quite a niche book, after all), but they should be able to order it for you. Physical bookshops are cool, and it would be a shame if they all went out of business. <3
(Many of the sites above also offer shipping to anywhere in the world, but it’s unfortunately not free.)
Note: some of the links above are affiliate links that earn me (the author) a small commission if you buy through them. If I can get paid for my hard work, it’ll encourage me to write more in the future :)