This book is really good: https://www.manning.com/books/the-design-of-web-apis https://www.manning.com/books/the-design-of-web-apis It even spends the first fe

This book is really good: https://www.manning.com/books/the-design-of-web-apis https://www.manning.com/books/the-design-of-web-apis It even spends the first few chapters talking about API design in general (not just for REST) with really great, intuitive examples.