He's one of the most sinister, liked and hated men in the B5 series but we don't know much about him (except for the one feature episode). This book tells the story of most of his life, starting from his school years in the Corp. (Which once again, like the first book in the trilogy, shows how the Corp operates, with some nice surprises). The story continues through most of Bester's life, including tie-ins with the series' episodes. It gives a good insight into just what telepaths can do, especially to mundanes. If you've read the first one, don't stop now it just keeps getting better. Once again brilliant!