Although it has a 1995 date, it is hands-down the most complete book on the market:
https://www.amazon.com/Do-Yourself-Housebuilding-Complete-Handbook/dp/0806904240
I built 2 houses using primarily this book:
https://www.amazon.com/Do-Yourself-Housebuilding-Complete-Handbook/dp/0806904240
(I used a lot of other books too, and the interwebs.)
I recommend George Nash:
https://www.amazon.com/Do-Yourself-Housebuilding-Complete-Handbook/dp/0806904240
At about 700 pages, it covers everything that will go into your addition, from the roof to the basement, and everything in between.
I picked up Do-It-Yourself Housebuilding: The Complete Handbook by George Nash and I haven't regretted it.