There are many books on the subject of ABAP Objects (called the object-oriented variant ABAP also ABAP OO). In this forest of books, you quickly lose track. Here I made my 5 Favorites. I’m in particular to the subject of good and practical examples. Just the appropriation of the object-oriented paradigm is BB´s by examples of immense easier (example-driven approach).
The following list is an ordered list of my personal favorites.
“Books are the quietest and most constant of friends;” “they are the most accessible and wisest of counselors and the most patient of teachers to.”-Charles William Eliot