Add Tech Interview Handbook

Author: yangshun

README.md

@@ -120,6 +120,7 @@ But knowing the stuff will help you become better! :muscle:*
 - :page_facing_up: [Equity 101 for Startup Employees](https://blog.esharesinc.com/equity-101-stock-option-basics/)
 - :book: [Cracking the Coding Interview: 189 Programming Questions and Solutions](https://www.goodreads.com/book/show/25707092-cracking-the-coding-interview)
 - :fire: [Everything you need to know to get the job](https://github.com/kdn251/interviews)
+- :book: [Tech Interview Handbook](https://github.com/yangshun/tech-interview-handbook)
 
 ### Remote Work
 - :globe_with_meridians: [Remote Work List for Developers](https://github.com/georgemandis/remote-working-list)