Three books in the package that have been revised for the 2017 NEC Code adoption. These are the three books, plus a 2017 NEC codebook that are used for the Texas Residential Appliance Installers License Prep Course. The workbooks are available for $150. The one day class includes about 8 hours of orientation and instruction to help you pass this Texas exam. The current pass rate is about 34%. Many people that have failed the exam prior to taking this course have passed the exam after going through the one day prep course. These materials are not intended to provide all of the information that you need to do the work. These materials are intended for people that are already trained for doing the work, but that need to pass this difficult exam.