Here are the cover images of some moped books:

The Complete Book of Mopeds
by Laura Torbet and Jonathan Sternfield

The Complete Book of Mopeds
by the Editors of Consumer Guide

Mopeds
by Paul Dupre

Moped the Wonder Vehicle
by Jerry Murray

Moped Maintenance and Repair
by Morris Fraser

Funky Mopeds
by Richard Skelton

Moped to South America

Two Stroke Tuners Handbook
by Gordon Jennings

Honda Motorcycle Identification Guide 1959-2000

Scoot Magazine 2009 Buyers Guide