If you are interested in buying ‘Your Brain in Sickness and in Health’ by Dr Sid Williams you have many options. It is available in soft cover, hard cover and e-book.
You can press the ‘order now’ button which will take you to ‘Lulu.com‘ – the publishers. They are in the US but the book is printed ‘on demand’ in a number of other countries.
You can ask your bookshop to order the book. Because the book is printed ‘on demand’ bookshops don’t usually have it on their shelves, but they can order it and it should be available soon after order.
You can buy it from just about any online book seller, including Amazon, the Book Depository, Barnes and Noble, and others (in Australia: Angus and Robertson, Booktopia, others)