Basically, for a small monthly fee you have access to a large number of interesting books which are not available on other subscription services. The service is multilingual, and includes travel guides, automotive histories, fiction and nonfiction in great variety.
If you know Russian, the service is especially good, but if you dont read Russian (or other languages other than English) there are still a vast number of books which will satisfy almost anyone.
I have Amazon Prime, but this service has an awful lot that is not found on that service, and which I enjoy. Overall, highly recommended if you are a reader looking for new books.
For example, I was able to find a Robert B. Parker novel, a history of the Mazda automobile, and a tour guide to Vietnam Laos & Cambodia, not the the sort of things that you would expect on a subscription service. If youre really into books I would recommend the premium service, since the variety there is great.
JohnSut about Bookmate. Listen & read books