Calder''s book is the one to get. I have had it for several years and still refer to it on a regular basis. He explains things very well.
Make sure you understand the difference between your DC ground, RF ground (for HF
radio and to eliminate RF noise in your electronics), and the bonding system that helps prevent electrolsis and may help reduce the probability of a lightening strike or the damage that results if you are hit. People tend to use the word "ground" when speaking about each of these different systems.
On a boat like yours I suspect that the DC ground is the only thing you really need to worry about. If you dont have an inboard engine you can buy a buss bar at the marine store and use it to tie the negative side of your DC system together. Make sure you mount it somewhere that is easy to reach with a screwdriver and not too far from the battery so you dont have to buy an expensive long cable. I cant figure out why anyone makes common slotted screws anymore. Get a buss bar with phillips screws. It might not make a lot of difference when its new but your chances of getting a corroded screw out ( a few years down the
line) is much better if its a phillips head screw.