I did an extensive Internet search for information about building smokehouses, and this book kept coming up as just about the only source of information currently in print. Its low price recommends it as a good source to begin with, although we found out the hard way that there's a section in the smokebox plans that's a bit confusing (When you put the front frame on the box, be sure to put the 2x3's on flat, attaching them through the 2" side). We also felt the structure is improved with the use of screws instead of nails, and by reinforcing the front frame with angle brackets.
Putting that aside (cut more wood), this succinct book gives the basics for putting together several forms of smokers of various sizes, and some beginning fundamentals of smoking meats. If you want details about the smoking process, though, we'd recommend you look at other books that really focus on technique.
No book about smoking meats seems to be complete, but this is the best we've found about building a smokehouse or one of the smaller alternatives (box or barrel).