Check out Object Oriented Programming in a Nutshell by Rob Myers. Here is an excerpt:
Next year I’ll likely be teaching Essential Test-Driven Development to a team that includes about 50% COBOL programmers. I told the client I’d look for a good object-oriented (OO) primer for those developers to read in advance. As you can imagine, it’s tough to “unit-test” software that doesn’t…
The full article is available here.