Up to date B cell review
Cellular and Molecular Immunology by Abul Abbas et al. is pretty good, and you can't beat Charlie Janeway's Immunobiology either. Both will give a good introduction to B-cells, antibodies, BCR signaling, and how they fit in to the immune system's structure and function. I own earlier editions of both, and their different perspectives are good for getting a more holistic understanding of the field. Good luck in your studies, it's a fascinating subject!