It’s a 4 book box set. Written by Roland Smith, the characters Marty and Grace encounter cryptids and thwart Noah Blackwood. Cryptid hunters is $6.99. Tentacles is $5.99. Chupacabra is $5.99. Mutation is $5.99. I had the box set custom made for $60. Only thing I made a mistake was on the series name, it should be Marty and Grace, not Cryptid Hunters.