"The Rainbow Machine - Tales from the Neurolinguist's Journal" by Andrew T. Austin is awesome. https://www.amazon.com/Rainbow-Machine-Tales-Neurolinguists-Journal/dp/0911226443
All the originals by Bandler and Grinder - eBay is your friend here as many are out of date and sometimes go for over-inflated prices. Look in the large second hand book dealers stores on ebay.
Everything by Steve and Connirae Andreas.
Mine: https://www.amazon.co.uk/dp/0911226443/ref=cm_sw_em_r_mt_dp_vxV.Fb2371XR7
Robert Dilts also has produced some excellent published resources as well as this massive resource and undertaking: http://nlpuniversitypress.com/html/CaCom40.html