As a programmer and a teacher of programming to those willing to learn, I have had countless opportunities to increase my knowledge of numerous programming languages and programming platforms that are used all over in every industry imaginable. Below is a pretty decent but incomplete list of books I have read in order to keep up on and stay relevant with these amazing programming languages.

JavaScript

• JavaScript: The Definitive Guide: Activate Your Web Pages (Definitive Guides) 
• JavaScript: The Good Parts
• Secrets of the JavaScript Ninja
• Async JavaScript: Build More Responsive Apps (Pragmatic Express)
• Professional JavaScript for Web Developers
• Dynamic HTML: The Definitive Reference
• JavaScript & DHTML Cookbook
• Ajax in Action
• jQuery in Action, Second Edition
• Learning jQuery – Fourth Edition
• Supercharged JavaScript Graphics: with HTML5 canvas, jQuery, and More
• Bulletproof Web Design (3rd Edition)
• jQuery: Novice to Ninja Second Edition Edition
• Jump Start JavaScript 1st Edition

Node.js

• Learning Node
• Node: Up and Running: Scalable Server-Side Code with JavaScript
• Node.js in Action
• Node.js the Right Way: Practical, Server-Side JavaScript That Scales

Angular.js

• Pro AngularJS (Expert’s Voice in Web Development)

CSS / CSS3

• The Book of CSS3: A Developer’s Guide to the Future of Web Design
• CSS3: The Missing Manual

HTML / HTML5

• HTML5: The Missing Manual (Missing Manuals)
• Microsoft Expression Web 4 Step by Step
• Head First HTML and CSS

XML

• XSLT Quickly
• XML Pocket Reference (Pocket Reference (O’Reilly))

Objective-C / iOS

• The Core iOS 6 Developer’s Cookbook (4th Edition) (Developer’s Library)
• The Advanced iOS 6 Developer’s Cookbook (4th Edition) (Developer’s Library)
• Sams Teach Yourself iOS 6 Application Development in 24 Hours (4th Edition)
• Programming iOS 6
• Programming in Objective-C (5th Edition) (Developer’s Library)

Ruby / Rails

• Ruby Programming
• Eloquent Ruby (Addison-Wesley Professional Ruby Series)
• Best of Ruby Quiz (Pragmatic Programmers)
• Programming Ruby 1.9 & 2.0: The Pragmatic Programmers’ Guide (The Facets of Ruby)
• Agile Web Development with Rails 4 (Facets of Ruby)
• Metaprogramming Ruby 2: Program Like the Ruby Pros

.NET C#

• C# 4.0 in a Nutshell: The Definitive Reference
• Learning XNA 4.0: Game Development for the PC, Xbox 360, and Windows Phone 7
• Foundation Expression Blend 3 with Silverlight (Foundations)

Java

• Introduction to Programming with Java: A Problem Solving Approach
• Java Foundations: Introduction to Program Design and Data Structures (2nd Edition)
• Head First Servlets and JSP: Passing the Sun Certified Web Component Developer Exam
• Murach’s Java Programming

Adobe

• Adobe Flex 4.5 Fundamentals: Training from the Source
• Foundation Actionscript 3.0 Animation: Making Things Move!
• Real-World Flash Game Development: How to Follow Best Practices AND Keep Your Sanity
• First Steps in Flex

Databases Miscellaneous 

• Databases Illuminated

Microsoft Access & SQL Server

• Your Office: Microsoft® Office 2010 Access: Comprehensive
• Microsoft SQL Server 2012 T-SQL Fundamentals (Developer Reference)