The National Association of Trailer Manufacturers (NATM), an organization that represents manufacturers that produce light and medium duty trailers, has produced The Trailer Handbook: A Guide to Understanding Trailers and Towing Safety. It is a 142-page, easy-to-follow resource covering the essentials of trailers and towing safety.
The handbook starts by discussing the dynamics of both the tow vehicle and trailer as a combination vehicle. The next section details important aspects of the trailer and the various components.
Following this is a discussion of the key considerations and general practices in maintaining trailers. The handbook concludes with appendices of additional useful information, including a glossary of terms and additional resources.
The Trailer Handbook is available for purchase from NATM at www.natm.com/Trailerhandbook.html, and from Amazon.