I've just published Aprende Test Driven Development, a book in Spanish to help you to learn TDD by practice, covering all topics related, even outside-in mockist style vs classic style, and how to organize coding-dojos, among others.

The book includes a lot of examples and code exercises explained step by step in several languages, such as PHP, Python, Scala, Ruby, Golang, Kotlin and Javascript.

Currently is available via LeanPub. Nevertheless I'm considering to make printed version in Lulu.

Also, if there are enough people interested, I'm open to translate it into English.