Minimum QRP: Doing more with under five watt amateur radio
Hand-carried QRP antennas: Simple antennas and accessories to operate from almost anywhere
The CW Geek's Guide to Having Fun with Morse Code
Portable Operating for Amateur Radio
Portable Wire Antennas
The ARRL Operating Manual for Radio Amateurs; Volumes 1 & 2
ARRL's Small Antennas for Small Spaces
Zen and The Art Of Radiotelegraphy
Oscilloscope Applications for the QRP Enthusiast