Re: Verilog E-Book
Look for "Verilog HDL: A Guide to Digital Design and Synthesis, Second Edition" in the EDA E-books Upload/Download section...
Very good for beginers. It concentrate from the start at showing that the language is geared toward hardware modeling, starting from gate-level design, up to dataflow and behavioral design. It doesn't mess with dark abstract concepts at the begining, but leave it to the 2nd section of the book (Advanced Verilog Topics). Have fairly enough examples, and each chapters have their set of exercises.
Asside from the book, you will need at least a Verilog simulator. Many can be found which are free. They may not have all the bells&whistle of commercial sims like ModelSim but still enough for learning.