- High performance Java persistance - Vlad Mihalcea
- Kotlin in Action - Dmitry Jemerov and Svetlana Isakova
- Effective Java (3rd edition) - Joshua Bloch
- Agile Software Development, Principles, Patterns, and Prcticies - Robert C. Martin
- Clean code - Robert C Martin
- Clean Architecture: A Craftsman's Guide to Software Structure and Design - Robert C. Martin
- The Software Craftsman: Professionalism, Pragmatism, Pride - Sandro Mancuso
- Blockchain Basics: A Non-Technical Introduction In 25 Steps - Daniel Drescher
- Understand programming - Gynvael Coldwind
- The power of habbit - Charles Duhigg
- The Anti-Procrastination Habit: A Simple Guide to Mastering Difficult Tasks - S.J. Scott
- Kotlin programming - Venkat Subramanian
- Java Concurrency in Practice - Brian Goetz