Good Technical Boat Publications
There are myriad books and magazines covering all sorts of topics related to boat operation and maintenance. Since this list is under the RESOURCES/ Engineering hierarchy of this site, the list below will deal solely with publications of a technical nature. I've personally reviewed all of the books (with the exception below) on this list and found them to be very good resources. From what I could tell from taking a peek at it on Amazon.com, the last book on this list "Quick and Easy Maintenance: 1,001 Time-Saving Tips" is more of a "helpful-hints from Captain Heloise" type of publication. It is included it on this list because it does contain some good information - most of the boat cleaning and minor maintenance tips could really help save program resources over the long haul.
Books
"Marine Diesel Engines: Maintenance, Troubleshooting, and Repair" -- by Nigel Calder
"Outboard Engines: Maintenance, Troubleshooting and Repair" -- by Ed Sherman
"Boatowner's Mechanical & Electrical Manual: How to Maintain, Repair, and Improve Your Boat's Essential Systems" -- by Nigel Calder
"Powerboater's Guide to Electrical Systems: Maintenace, Troubleshooting, and Improvements" -- by Ed Sherman
"The Fiberglass Boat Repair Manual" -- by Allan H. Vaitses
"Refrigeration for Pleasureboats: Installation, Maintenance and Repair" -- by Nigel Calder
"Quick and Easy Boat Maintenance: 1,001 Time-Saving Tips" -- by Sandy Lindsey
Magazines
Professional Boat Builder, go to the website to apply for a free subscription.
Cruising World - A magazine devoted primarily to recreational boating that will frequently feature articles of a technical nature. Go to the website to subscribe.
Web Sites
Cruising World - In case you missed the link under "Magazines." This site has useful information from past magazine issues on various topics.
Blue Sea Systems - Maintains a very nice site chock full of good information relating to boat electrical systems. Blue Sea Systems is a manufacturer/seller of marine electrical components.
Alden Trull Yacht Electrical Design - Offers a shareware wire sizing program, Wire Sizer, for low voltage DC wire runs. (full page loads in IE, but not in Firefox)