Reddit mentions of Sams Teach Yourself Object Oriented Programming in 21 Days

In order:

1. Sams Teach Yourself Java in 24 Hours, https://www.amazon.com/Java-Hours-Teach-Yourself-Covering/dp/0672337940/ref=sr_1_1?ie=UTF8&qid=1518195283&sr=8-1&keywords=Sams+Teach+Yourself+Java+in+24+Hours
   
   
2. Sams Teach Yourself Object Oriented Programming in 21 Days, https://www.amazon.com/Teach-Yourself-Object-Oriented-Programming/dp/0672321092/ref=sr_1_1?s=books&ie=UTF8&qid=1518195312&sr=1-1&keywords=Sams+Teach+Yourself+Object+Oriented+Programming+in+21+Days
   
   
3. Design Patterns in Java Tutorial - TutorialsPoint, https://www.tutorialspoint.com/design_pattern/
   
   You should also learn about testing and how to write good tests.
   
   
4. Test Pyramid, https://martinfowler.com/bliki/TestPyramid.html
   
   
5. JUnit Tutorial, https://www.tutorialspoint.com/junit/index.htm
   
   
6. Mockito Tutorial, https://www.tutorialspoint.com/mockito/index.htm
   
   Note: It will take a bit of ingenuity to figure out how to apply the last two in Apex, but contrary to popular believe and practice, atomic tests are possible. I started working on a project to demonstrate and faciliate creating maintainable code, but the samples are too complicated, the documention needs a lot of work, there are large sections I want to refactor, and (ironically) the tests aren't even complete, but if you want to check it out: https://github.com/nilvon9wo/FakeForce