If someone is that far into writing bad code, computer science textbooks are the last thing they need. Algorithmic awareness does not result in readable code, and cyclomatic complexity has only a very loose relationship with computational complexity. In fact, code written by computer science professors is routinely some of the messiest, gnarliest stuff I encounter.

Books like Domain Driven Design are helpful for people who don't know how to program cleanly, but the most important thing is really mentorship from a good programmer. People need code reviews that are firm and guide them in the right direction.