Update: Larry Solum on Legality:
I've read multiple versions of several chapters, an earlier version of almost the whole book, and most recently the uncorrected page proofs. I feel confident that Legality is one of the very best books in general jurisprudence in many many years; it will certainly be on my list of ten selections from the Legal Theory Bookworm from 2010. I suspect that Legality will be become a standard work for students of law and philosophy. It is both deep and clear.
Everyone who engages in the academic study of law should read Legality--it is that important. Buy it and read it!