I'm going through that right now, and finding it incredibly good, but still fairly outdated. It was written for Java 6, while Java 7 and (especially) 8 have more or less re-written the language. All of the advice is still really great, but some of the items are workarounds for weaknesses in the language that have since been strengthened. I'm working through Java 8 in Action[0] in parallel, and it's been a good experience.

I've also been enjoying this Modern Java blog series, which is book-ish[1].

In a similar vein, I really enjoyed Effective Modern C++[2].

I think The Ruby Way[3] is still the best ruby book, and a new edition just came out earlier this year.

I'm looking for a good book about modern javascript if anyone has any suggestions.

[0]: https://www.goodreads.com/book/show/20534354-java-8-in-actio...

[1]: http://blog.paralleluniverse.co/2014/05/01/modern-java/

[2]: https://www.goodreads.com/book/show/22800553-effective-moder...

[3]: https://www.goodreads.com/book/show/4514.The_Ruby_Way

I found Effective Java to be very enlightening—not just for Java, but for any language. It's especially at providing patterns for writing APIs with a guide toward future maintainability.