What is the difference between Code Check 9th Combo and Code Check 2nd Complete?
Code Check 9th edition Combo is our signature flip-chart format with 31 pages of varying lengths. It is based on the 2018 I-Codes & U-Codes, and the 2017 NEC.
Code Check complete is a spiral bound 5 1/2 X 8 1/2 book with 234 pages. It is based on the 2009 I-Codes & U-Codes, and the 2011 NEC.
Code Check Complete, contains all the material that was in the standalone Building, Plumbing & Mechanical and Electrical books. The current Code Check Complete is older but has far more information.
The right book(s) for you would depend on what you are using it for, i.e., whether you are a contractor, inspector, home inspector, etc., and on the state where you live. As of 2020, about half the states still use the 2018 codes, and others use older ones.