I have the official 450lb, 4,952 page, Honda Manual & ETM. I think I paid about $75 from WingStuff. It is not a layman's book. To me, it's more like a Training manual that a student would use in a Motorcycle Shop Repair Course under the leadership of a trained instructor.Hey Twitch - You should keep an eye on Amazon or ebay for a Clymer maintenance manual on your 1800. In my opinion these books are the preferred source of service and repair information for most owners/enthusiasts. Over the years, I have bought a Clymer manual for each one of my Goldwings because they explain everything from a relatively minor tune-up to a major tear down in layman’s terms. What I like best is that they have lots of photos and cover the steps needed to troubleshoot all kinds of electrical problems. The mechanical, electrical and logic circuits on how the reverse system works is especially nice to know. Using my Clymer manual on the SE 1500 helped to chase down an intermittent connection issue on a friend's bikes that had plagued him for almost a year. Each time he took it in to the dealer he was told that they could not duplicate the problem for some reason.
Here is a current link to ebay for a new/unused Clymer 2001 - 2010 1800 manual with a buy it now price of $35.42 including shipping. At one time the Clymer manuals were almost $100.
Good Luck, Michael