I have listed some of the books I used for the exams on ebay in below links. PM me for more details or discount if you buy all of them
https://www.ebay.com/itm/FE-Electrical-and-Computer-Review-Manual-by-Michael-R-Lindeburg-2015/143252403691?hash=item215a8235eb:g:RMsAAOSwK6RZKUSM
https://www.ebay.com/itm/Key-Word-Index-based-on-the-2017-NEC-Code-by-Tom-Henry-Paperback-Softbound/143252386574
https://www.ebay.com/itm/Electrical-Engineers-Guide-to-Passing-the-Power-PE-Exam-Spiral-Bound-Version/143252392444
https://www.ebay.com/itm/Electrical-Code-Drill-Book-By-Complex-Imaginary/143252399558
https://www.ebay.com/itm/Complex-Imaginary-Practice-Exams-volumes-1-4/143252402399
https://www.ebay.com/itm/Uglys-Electrical-References-2017-Edition-Reference-Book-Spiral-Edition/143252395530?hash=item215a82160a:g:SmQAAOSwTa1c23qC
https://www.ebay.com/itm/FE-Electrical-and-Computer-Review-Manual-by-Michael-R-Lindeburg-2015/143252403691?hash=item215a8235eb:g:RMsAAOSwK6RZKUSM
https://www.ebay.com/itm/Key-Word-Index-based-on-the-2017-NEC-Code-by-Tom-Henry-Paperback-Softbound/143252386574
https://www.ebay.com/itm/Electrical-Engineers-Guide-to-Passing-the-Power-PE-Exam-Spiral-Bound-Version/143252392444
https://www.ebay.com/itm/Electrical-Code-Drill-Book-By-Complex-Imaginary/143252399558
https://www.ebay.com/itm/Complex-Imaginary-Practice-Exams-volumes-1-4/143252402399
https://www.ebay.com/itm/Uglys-Electrical-References-2017-Edition-Reference-Book-Spiral-Edition/143252395530?hash=item215a82160a:g:SmQAAOSwTa1c23qC