- https://learning.oreilly.com/library/view/developer-testing-building/9780134291109/ - great overview of TDD (code C# & Java - but quite easy to read and understand)
- https://learning.oreilly.com/library/view/python-testing-with/9781680502848/
- https://learning.oreilly.com/library/view/test-driven-python-development/9781783987924/ - TDD in Python (nontrivial example of app developed with TDD)
- https://learning.oreilly.com/library/view/refactoring-improving-the/9780134757681/ - Bible of refactoring
- https://learning.oreilly.com/library/view/testing-python-applying/9781118901243/ - TDD, BDD & Acceptance Testing in Python (sadly not pytest but unittest & nose)
- https://www.amazon.pl/Clean-Code-Handbook-Software-Craftsmanship/dp/0132350882/ref=asc_df_0132350882/?tag=plshogostdde-21&linkCode=df0&hvadid=504212245098&hvpos=&hvnetw=g&hvrand=13107589373323222363&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9067437&hvtargid=pla-435472505264&psc=1 - must read clean code bible
- https://martinfowler.com/articles/mocksArentStubs.html - classic essey on mocks & stubs
- https://learning.oreilly.com/library/view/architecture-patterns-with/9781492052197/ - great insight into advanced subjects like Layers, DDD, Design Patterns & TDD
- https://pyvideo.org/europython-2011/python-design-patterns.html - Great introduction into Design Patterns in Python