Those of you who enjoy archaeological mysteries might like Thunderhead, a stand-alone novel by Douglas Preston and Lincoln Child. A young archaeologist, Nora Kelly, has received a letter from her father, who has been missing for 16 years. In the letter, he claims to have found the city of Quivira--the legendary City of Gold sought by Coronado and other explorers. Nora manages to put together an expedition to find the city, but begins to be plagued by troubles, some of them by a group of supernatural creatures determined to protect the location of the city. Once again, Preston and Child put together a great page-turner with a hint of the supernatural.