The Designer's Guide to Verilog starts out by providing some backgound including a brief history of Verilog, a discussion of levels of abstraction, the scope of Verilog, design flow using Verilog, and synthesizing Verilog. It then moves on to details of designing hardware using Verilog, including:

A Simple Design Wires Wire Assignments A Design Hierarchy Test Benches Response Capture RTL Verilog If statement Synthesizing Latches