The continuing saga of Vince, George, Tommy, Oki, Pete, and Trev, as they deal with life, work, love, and putative criminals.

Vince - book two - obviously continues from where we left off in book one, but introducing the new characters of Oki and AA, new nasties like the local IRA and Mr Saito, and new situations for the characters to find a way out of.
I think it works as a stand-alone book, as well as a continuation.
But - read it for yourself, and make your own minds up.