Over 900,000 copies sold in the series This easy-to-read adventure is number 21 in this long-running, successful series and is now available in softcover. The adventure continues as Patrick and Beth end up in New York City as inventor Nikola Tesla is embroiled in a patent conflict with fellow inventor Thomas Edison. When they step into the Imagination Station, kids experience an unforgettable journey filled with action-packed adventure to inspire their imaginations. With each book, they're whisked away with cousins Patrick and Beth to embark on a new journey around the world and back in time.