I preferred Erlang Programming [1] to LYSE.

http://shop.oreilly.com/product/9780596518189.do

For those of you who don't now, Francesco Cesarini is the founder and CTO of Erlang Training and Consulting, and has been a major proponent of Erlang for years, also having co-written the book "Erlang Programming" (http://oreilly.com/catalog/9780596518189 - it's a great book, I highly recommend it myself)

As a long time Java programmer I recommend these two:

http://www.amazon.com/ERLANG-Programming-Francesco-Cesarini/...

http://www.amazon.com/Programming-Erlang-Software-Concurrent...

Okay, just kidding. =)

On a serious note, Effective Java is one of the best out there.