ARRL's VHF Digital Handbook -- Dive into the digital radio universe!

Nifty E-Z Guide to D-STAR Operation -- Now Shipping! -- The first comprehensive reference to the world of D-STAR operation!

Digital Signal Processing Technology -- Essentials of the Communications Revolution. An understandable presentation and reference on DSP in contemporary communications technology.

The ARRL Software Library for Hams 3.0 -- Now Shipping! -- CD-ROM, Version 3.0. Quick access to utilities, applications and information.

Morse Code for Radio Amateurs -- Includes a free CD of audio and computer programs.