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As a self taught developer there are only a few books I read early in my career that seriously impacted how I write code.

1. XML Schema by Priscilla Walmsley -

2. DOM Scripting by Jeremy Keith -

3. CSS Pocket Reference - Eric Meyer -

Most of the developers I have worked with in my career are absolutely terrified by tree structures. They will admit otherwise like some kind of pathological liar, but this is easily exposed and that's so unfortunate. A tree structure is just a data structure like any other and embracing that liberates you from a kind of Stockholm Syndrome.

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