Links to Verilog books that are available, if you've used one, please let us know how you found it so we can add some comments below each.
Verilog HDL - A Guide to Digital Design and Synthesis
by Samir Palnitkar
Sun Microsystems Press
This was the standard text for a good verilog course i attended about two years ago, and was the in-house verilog starter manual for anyone going anywhere near an asic. the cd includes a verilog simulator (silos iii if i recall correctly).