Margaret and Sparkle Dog

Book 26 — The California Gold Rush Adventure

Book 27 — The Ancient Rome Adventure

Book 28 — The Plymouth Colony Adventure

Book 29 — The Transcontinental Railroad Adventure

Book 30 — The Renaissance Florence Adventure

Book 31 — The First Airplane Flights Adventure

Book 32 — The Klondike Gold Rush Adventure

Book 33 — The Ancient Mesopotamia Adventure

Book 34 — The Lewis and Clark Adventure

Book 35 — The Ellis Island Adventure

Book 36 — The Pompeii Escape

Book 37 — The Pirate Island Treasure

Book 38 — The Samurai Castle Mystery

Book 39 — The California Mission Mystery

Book 40 — The Titanic Time-Travel Mystery

Book 41 — The Australian Outback Rescue

Book 42 — The Secrets of Machu Picchu

Book 43 — The Pony Express Adventure

Book 44 — The Yellowstone Mystery

Book 45 — The Great Chicago Fire Escape

Book 46 — The Alaskan Iditarod Adventure

Book 47 — The Secrets of Easter Island

Book 48 — The Wright Brothers Flying Adventure