To prepare for my PSI exam, I was looking at Tom Henry 102-14 (link: http://www.code-electrical.com/2014jmanbook.html) and also 105-14 (link: http://www.code-electrical.com/2014calculations.html). First, do you guys recommend these books to pass my PSI? Second, the guy at Tom Henry customer service said that these books are NOT specific to the PSI exam, that they are general questions regarding the NEC code. Then he went on this rant about how the books are to help me learn, not to pass. Well, I have the codebook and experience that I learn from. What I want is a guide to help me pass, and practice exams so I know what to expect. Can anyone tell me if these books are good for preparing for the PSI exam? If not, can you recommend a good practice exam book? Thanks!