Professional WordPress Plugin Development

All three authors are well-known and trusted members of the WordPress community. The subject matter is presented in an easily understandable way and apart from learning plugin developent, the book can be used as a reference guide. The only notable omission is the WordPress customizer which although originally known as the 'theme customizer' is also used in plugins which add content that can be styled or customized.

Good update and a great reference, for those who have a tendency to forget.

Me ha servido de mucho, muy bien explicado y con ejemplos claros

If you want to create WordPress plugins and have a resource that is up to date. This is it. Trust me, I looked and this was the resource I needed.

This is a great book by guys who know what they are talking about. It is NOT an introduction to programming - you need to have some programming skills before going in. But it is exactly what a programmer who is considering developing plugins for WordPress needs. Highly recommended.