The Mystery of the Pharaoh's Diamonds - Ruthless international diamond smugglers think they've gotten away with the perfect crime, stealing the famous Ramesses diamonds from the Hancock Museum of Archeology. Until ... Twelve-year-olds Ava and Carol explode onto the scene. Bursting at the seams with energy and sass, the humbly hip duo is determined to catch the bad guys and return the stolen jewels. It's a race against time as the girls realize the thieves plan on smuggling the diamonds out of the country. If they don't hurry, the bad guys will get away and the priceless diamonds may be lost forever!

The Mystery of Solomon's Ring - Which would you choose? Helping an old man that's being kidnapped, or endless plates of delicious pasta? Ava and Carol were about to take a stroll through Italy, when an old man is chased down and then thrown into the back of a car. At the last second, using sign language he sends a secret message to the girls. The girls hide in the shadows as the car races away. Fearing for the man's life, the girls begin to track down clues. Only what they discover this time, is a religious relic that has magical powers. Suddenly evil and powerful villains are chasing them. The clues lead to France, where Ava and Carol are thrust into a secret battle between the Knights Templar and a group of Criminals that will stop at nothing, to get Solomon's Ring.

The Haunted Mansion - It's Christmas - so why not accept a dare to explore a creepy old haunted house? Fearless best friends Ava and Carol set out to prove that the Butcher house isn't haunted. Only, Carol is pretty sure she saw something inside one of the windows - and moments later they are chased by a headless monster?! The girls receive an ominous threat, Stay Away or Else! Now, more than ever the girls are determined to find out who is trying to scare them away. But before they can continue their investigation, a string of mysterious robberies take place. The thieves simply vanish without a trace. Join Ava and Carol as they race against time to track down a headless monster terrorizing the neighborhood, solve the mystery behind the Butcher house and stop a band of ruthless thieves before they strike again!