- Verilog Reference Manual A short fairly comprehensive report. Not lots of detail but it does have code examples.
- Verilog Tutorial A large tutorial that covers most things you need. Pretty easy to read.
- Edinburgh Verilog Site Lots of nice odds and ends. The manual is a good language reference.
- Verilog Quickstart Google book preview, the book is fairly good, and covers a lot, but being google book previews it skips pages. Even with this it is a good reference.
- Verilog Tutorial A pretty good tutorial, that has fairly deep coverage. Worth a look.