Who has already tried, what would you advise on learning Groovy (literature, sites)?

Question

Grails

And the general impressions from experienced comrades are also interesting. Interested, since the only scripting language in my arsenal was PHP, for many reasons I want to abandon it. The main candidate to replace it is Groovy.

Answer 1

impressions are purely positive.
Groovy In Action, 2nd Edition:
www.manning.com/koenig2/
groovyblogs.org/ , www.groovytweets.org/ - all relevant posts about groovy technologies go here

Answer 2

Not really literature, but this guy writes a lot about Groovy mrhaki.blogspot.com/
I think it will be useful.

Answer 3

Venkat Subramaniam - "Programming Groovy"
I liked the presentation style. In addition, the book itself is small, and makes it possible to quickly start programming on the subject.

Answer 4

Groovy in Action

Answer 5

I highly recommend starting with an article on Habra Groovy in 15 minutes , it helped me a lot in the initial push to master it. To solve work problems, I use the groovy.codehaus.org portal and the User + Guide section - there are a lot of useful and understandable examples.