General

Clean Code: A Handbook of Agile Software Craftsmanship

The Pragmatic Programmer: Your Journey To Mastery, 20th Anniversary Edition (2nd Edition)

Code Complete: A Practical Handbook of Software Construction, Second Edition

Refactoring: Improving the Design of Existing Code (2nd Edition) (Addison-Wesley Signature Series (Fowler))

Frontend Development

JavaScript: The Good Parts: The Good Parts

https://github.com/getify/You-Dont-Know-JS

CSS Secrets: Better Solutions to Everyday Web Design Problems

Eloquent JavaScript, 3rd Edition: A Modern Introduction to Programming

Backend Development

Designing Data-Intensive Applications: The Big Ideas Behind Reliable, Scalable, and Maintainable Systems

Spring in Action

Data Science

Python for Data Analysis: Data Wrangling with Pandas, NumPy, and IPython

The Elements of Statistical Learning: Data Mining, Inference, and Prediction, Second Edition (Springer Series in Statistics)

DevOps Engineering

The DevOps Handbook: How to Create World-Class Agility, Reliability, and Security in Technology Organizations

Site Reliability Engineering: How Google Runs Production Systems

Cybersecurity

The Web Application Hacker's Handbook: Finding and Exploiting Security Flaws

Metasploit: The Penetration Tester's Guide

Cloud Solution Engineering

Aws Solutions Architect Associate Sg (Aws Certified Solutions Architect Official: Associate Exam)

AI Engineering

Hands-On Machine Learning with Scikit-Learn, Keras, and TensorFlow: Concepts, Tools, and Techniques to Build Intelligent Systems

Deep Learning (Adaptive Computation and Machine Learning series)

AI Ethics