Over 1 million sold in series!The adventure continues as Patrick and Beth end up in New York City in 1923 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. This easy-to-read adventure, number 21 in the series, is the latest in the long-running successful series that has sold over 1 million books.