I don't think there is anything particularly brilliant.

There's Category Theory for Computing Science by Barr and Wells (http://www.case.edu/artsci/math/wells/pub/ctcs.html), which is a good enough book but hardly comprehensive.

I don't know any way round the fact that category theory is difficult to learn. I think that's partly inherent in the subject, not helped by the lack of a really good textbook suitable for beginners.

(Here is the totality of my published work in category theory: http://arxiv.org/pdf/math/0604542v3)