Guys

I am big bore shooter (bolt action) but have not yet taken the plunge to get a double rifle and would like to do so in the near future. However I don't have a lot of knowledge on doubles like the difference between sidelocks and boxlocks and their advantages/disadvantages. I'm learning alot just reading many of your comments on the forum but I am also looking for some books on the subject to be better prepared when I do start looking at a purchase. My question (finally) is what books (or other sources of information) you would recommend for someone new to the subject.

Thanks, in advance, for your help!

SteveM