Bigfoot hunters were perhaps the most surprising group, Bader said. They defied all stereotypes of paranormal pursuers who wear flowing clothes and commune with spirits.
Instead, they were very serious, extremely conventional and often highly professional. In fact, their beliefs contradicted their lifestyles so much that many of them were plagued by anxiety, which drove them even further to stick to their beliefs.
"Their friends and family consider them kooky," Bader said. "Everyone is saying they're nuts. So, they have a real aggressive style and seriousness of purpose. They want to prove everyone wrong."
For one hunter, the search began one day when he was out in the woods and, he swears, he saw Bigfoot cross his path.
"Imagine the stress that would put on your life," Bader said. "You consider yourself a normal, smart guy, and you think you just saw a giant monkey walk in front of you. Now, you have to fit that into your life."
"These are not people trying to explain a crazy world," he added. "They are trying to prove to themselves that they aren't crazy."