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Head First is a series of introductory instructional books to many topics, published by O'Reilly Media.

Content:

Head First: Software Development
Head First: A Learner's Guide to Programming Using the Python Language
Head First: Ajax
Head first: Design Patterns
Head First: EJB
Head First: HTML with CSS & XHTML
Head First: iPhone Development
Head First: Java 2nd Edition
Head First: javascript
Head First: Networking
Head First: Object Oriented Analysis and Design
Head First: Php and Mysql
Head First: Ajax
Head First: SQL
Head First: Servlets and JSP
Head First codes_Code&answers