books on loft design?

[pigeedoodle]

Hi Folks,
After keeping a few pet pigeons as a kid (mostly injured street birds) I finally am able to get involved again (gee just a thirty or so year break ). I'm trying to learn all I can and I'm still not exactly sure what sort of breed I will be keeping (too many amazing beautiful breeds!). Anyhoo -- I've been looking for information on loft designs -- with specific requriements. Like for example -- are concrete floors best for keeping them clean? etc. Does anyone have the titles of books or websites that would have fairly specific instructions and suggestions? Since I live on a farm I'm thinking of birds that can fly and will stick around i.e. Nuns....maybe I think choosing is the hardest part! I'm really excited... this is something I've always wanted to do. Thanks!