Recommended books and websites

[samdark (Alexander Makarov)]

There are some books and websites that may help you learn beyond the framework.

Code, architecture

• Matthias Noback, Object Design Style Guide
• Sourcemaking
• Refactoring Guru
• Martin Fowler, Refactoring

SQL, databases

• Markus Winand, Use the index, Luke!
• Markus Winand, Modern SQL

Computer science basics

• Computer Science Distilled - if you have no idea about algorithm complexity etc. yet.

[ramram (Ramin Farmani)]

also there is a greate book by Martin Fowler

https://martinfowler.com/books/refactoring.html

[samdark (Alexander Makarov)]

It is classic but, to my taste, that is hard to read one. Added it to the list.