How many books has Andy Briggs written?

As of my most recent knowledge update, which was in October 2021, Andy Briggs has published at least 15 books, including:

- "Head First Java, 3rd Edition"

- "Head First Object-Oriented Analysis and Design"

- "Head First C#, 3rd Edition"

- "Head First Software Development"

- "Head First Python, 2nd Edition"

- "Head First Rails"

- "Head First JavaScript Programming: A Brain-Friendly Guide"

- "Head First jQuery: A Brain-Friendly Guide"

- "Head First HTML5 Programming: A Brain-Friendly Guide"

- "Head First Android Development: A Brain-Friendly Guide"

- "Head First Git"

- "Head First Statistics: A Brain-Friendly Guide"

- "Head First Programming: A Brain-Friendly Guide"

- "Head First Agile: A Brain-Friendly Guide"

- "Head First SQL: A Brain-Friendly Guide"

It's important to note that this information might be outdated since my last update, and there could be additional books published by Andy Briggs since then. For the most up-to-date information, I recommend checking the official website of the publisher or Andy Briggs' website.