show's main cast; its plot revolves around three Jeffersonian Institute lab technicians who use their skills to solve a mystery. Aside from the television broadcast of Bones, its characters and concepts have also been produced in print, on the Internet and in short videos for mobile phones. Currently, there are two print books related to the series, one a novel and the other an official guide. Buried Deep (also released as "Bones Buried Deep"; ), written by Max Allan Collins, was published by Pocket Star February 28, 2006. The book is based on the characters in the television series rather than the characters created by Kathy Reichs, who had inspired the concept of Bones. Its plot focuses on Dr. Temperance Brennan and Special Agent Seeley Booth's investigation into the skeletal remains left on the steps of a federal building and its connection with a Chicago mob family. Angela, Hodgins and Zack only appear on the end of telephone conversations with Brennan. Bones: The Official Companion () is written by Paul Ruditis and published by Titan Books, released October 16, 2007. The book includes cast and crew interviews, episode guides and a background detail on real-life forensics. Fox initially made extensive use of the internet to promote Bones. Prior to the broadcast of the second-season episode "The Glowing Bones in the Old Stone House", profiles of the characters involved in the episode were put up on their own MySpace web page. The blog entries of the characters were created to give insight into the potential suspects to be featured in the episode. In the episode, Brennan and her team uses clues from these web pages, which the viewers can also access. Bonus content was posted by Fox on Bones official site during the third season, which include short videos featuring Booth and Brennan waiting to see Dr. Sweets for couple's therapy. The eleventh season episode "The Resurrection in the Remains" contains a crossover with fellow Fox TV series Sleepy Hollow which concludes in Sleepy Hollows third season episode "Dead Men Tell No Tales". In the final season of Lucifer, the titular character's future daughter Rory Morningstar tells her father about a show called More Bones, a spin-off of the series from her time. Home media The first three seasons, the ninth, tenth, eleventh and twelfth season were released on DVD format only, while seasons four through eight were also released on