The Admiral Hornblast's Nameplate Mystery/The Secret Spy Ring Mystery
The Sleeptown Mystery/The Mystery of the Switched Cars
The Apple Orchard Spaceman Mystery/The Pick and Run Mystery
The Whoop Whoop Whoop Mystery/Missing Mayor Mystery
The Mystery Invitation/A Spoon Full of Mystery
The Big 10 Mystery/The Whistle Blower Mystery
The No News Today Mystery/The Big Tooth Mystery
The Achoo Mystery/The Missing Laundry Mystery
Huckle Unlocks a Mystery/The Messy Car Mystery
The Mystery of the Lost Bag/The Flat Tire Mystery
The Delayed Delivery Mystery/The Busytown Fairies Mystery
The Numbered Papers Mystery/The Sour Milk Mystery
The Totally Fishy Mystery/The Radio Message Mystery
The Lost Key Mystery/The Door Knocker Mystery
The Red Spot Painter Mystery/The Teeny Weeny Piano Mystery
The Flattened Field Mystery/The Flying Potatoes Mystery
The Busytown Lake Monster Mystery/The Bad Driver Mystery
The Vanishing Hopscotch Mystery/The Hidden Treasure Mystery
The Mystery of the Lost Camera/The Jellybean List Mystery
The Mysterious Color-Changing T-Shirt/The Metal Finger Mystery
The Now You See It, Now You Don't Mystery/The Mystery of the Missing Pirate Gold
The Disappearing Dolly Mystery/The Vanishing Vehicle Mystery
The Missing Cookie Coupon Mystery/The Mystery of the Broken Boat
The Mislaid Sketchbook Mystery/The Hot and Cold Mystery
The Sandcastle Squasher/The Strange Ski Tracks Mystery
The Mystery of the Mumbling Mummy/The False Alarm Mystery
The Lost Key Mystery/The Door Knocker Mystery
The Mystery of the High Jumper/The Mystery of the Summer Snowman
The Borrowed Book Mystery/The Mystery of the Missing Mystery Books
The Eight Shoes Mystery/The Something in the Woods Mystery
Huckle, Where's My Apple Car?/The Dirty Laundry Mystery
The Mysterious Color-Changing T-Shirt/The Metal Finger Mystery
The Mystery of the Unpopular Pizzeria/The Silly Scarecrow Mystery
The Disappearing Home Mystery/The Flipping, Flying, Slipping, Sliding Mystery
The Disappearing Swimming Hole/The Forgotten Fire Hose Mystery
The Falling Fruit Mystery/The Dragon Hunters
The Smudged Letter Mystery/The Mystery Present
The Bank Note Mystery/The Flying Saucer Mystery
The Vanishing Tiara Mystery/The Postage Stamp Mystery
The Pretty Park Mystery/The Missing Museum Statue Mystery
Chain of Mysteries/The Mystery of the Unfinished Painting
The Mystery of the Unbreakable Bed/The Twisty Line Mystery
The Cheese Car Chomp Mystery/Where's the Hero?
The Playground Mystery/The Crazy Clock Mix-Up Mystery
Where's Junior?/The Secret Club Mystery
Litterbug Busters/There Might Be Giants
The Invisible Cake Snatcher/On the Move
Six Little Muffins/The Crashing Cans Mystery
The Sticky Stuff Mystery/Up, Up and Away
The Lighthouse Ghost Mystery/Cornfield Confusion
The Trouble with Bubbles/Little Orphan Egg
The Mystery of the Lost Parrot/The Monster Mystery
The Mystery Wheel/Busytown Blue-Bottoms
The Big Apple Mystery/The Missing Pickle Car Mystery