Cody Polston's new book is out. It is a good read if you are serious about ghost hunting.
For decades ghostly tales have been told across the land of enchantment. New Mexico's macabre past has created its share of phantoms. From by-gone gunfighters and wealthy socialites to murdered prostitutes and children, their tragic lives have left an imprint in time and legend. For 20 years ghost investigator Cody Polston has searched New Mexico's famous haunted locations for evidence of the supernatural. Now, for the first time, the complete findings of all of his investigations are revealed. The ghost stories and history of New Mexico's most haunted places are fascinating, but are they really haunted by ghosts?
https://www.amazon.com/gp/product/1791603785/ref=dbs_a_def_rwt_bibl_vppi_i0