As you are a beginner, you must have to go through the following books to get deep into automation testing.
1. Clean Code: A Handbook of Agile Software Craftsmanship by Robert C. Martin <br>
2. The Just Enough Software Test Automation by Daniel J. Mosley and Bruce A. Posey <br>
4. Software Test Automation: Effective Use of Test Execution Tools by Mark Fewster and Dorothy Graham <br> Original Source: Top 10 Books for Getting Started with Automation Testing