The Sherlock Files: The 100 Year Old Secret by Tracy Barrett
The 100 Year Old Secret is the first book in the Sherlock Files series written by Tracy Barrett.
When their parents are offered an employment opportunity in London, England, Xena and her younger brother, Xander Holmes, move from their sunny Florida home to cold and wet London. Xena and Xander find that life in England is dull and boring. Both siblings pass the time by sitting on the steps in front of their hotel playing their favorite game where they use their powers of observation to guess a passerby’s occupation based on their appearance.
One day, while Xena and Xander are playing “The Game,” a strange man approaches them and gives them a mysterious note written in disappearing ink. The note tells the children to go to the Dancing Men Pub. Feeling a sense of curiosity and adventure, both children go to the pub where they are given a series of tests.
After successfully passing each test, Xena and Xander are introduced to a secret society called the “Preservation of Famous Detectives.” They learn that they are the great-great-great grandchildren of the famous detective, Sherlock Holmes. As the decedents of the great detective, they are given a casebook containing Sherlock’s unsolved mysteries.
Immediately after they are given the casebook, both children find themselves solving the case of a missing portrait by Nigel Bathelson, whose other works are being displayed in a local gallery.