Return of the Spider by James Patterson

Alex Cross thought serial killer Gary Soneji was dead and buried. But when a hidden cabin reveals a stash of gruesome trophies and diaries, Cross realises the Spider's evil influence has spread wider than he ever thought possible. As he studies the clues, Cross becomes enmeshed in a web of evil designed to ensnare him all along. Now he must retrace the steps of a long-ago investigation and face... the Return of the Spider.