The Man Who Made Time Travel

The Man Who Made Time Travel follows John Harrison, an 18th century clockmaker who seeks to solve one of navigation's greatest challenges - determining longitude at sea. As ships ventured across oceans, the inability to calculate exact positions led to countless disasters and lost vessels. Harrison dedicates decades to creating a chronometer precise enough to help sailors find their location at sea. His work puts him in competition with astronomers and mathematicians who favor celestial methods, leading to conflicts with Britain's scientific establishment. Without formal education or social connections, Harrison must prove his revolutionary ideas through determination and craftsmanship. His quest takes him from his rural clockmaking workshop to London's halls of power as he pursues official recognition and reward. The book examines themes of perseverance against institutional resistance and the power of practical innovation to change the world. Through Harrison's story, readers see how advances in timekeeping transformed humanity's relationship with global navigation and travel.

Most readers found this children's biography accessible and engaging for teaching about John Harrison's quest to solve maritime navigation. Multiple teachers mentioned using it successfully with students aged 8-12 to demonstrate perseverance and innovation. Liked: - Clear explanation of longitude problem for young readers - Historical accuracy while maintaining narrative flow - Illustrations help visualize technical concepts - Serves as introduction to maritime history Disliked: - Some found the historical context lacking - Technical details occasionally oversimplified - Several readers wanted more details about Harrison's later life - A few noted historical inaccuracies in illustrations Ratings: Goodreads: 3.9/5 (127 ratings) Amazon: 4.3/5 (21 ratings) "Perfect blend of science and storytelling" - School librarian review "My students connected with Harrison's determination" - 5th grade teacher review "Could have provided more depth about the time period" - Parent review

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🕰️ The book's subject, John Harrison, was a self-taught clockmaker who spent over 40 years perfecting his marine chronometer to solve the longitude problem - one of the greatest scientific challenges of the 18th century. ⚓ The British government offered a prize of £20,000 (equivalent to millions today) to anyone who could develop a reliable way for ships to determine their longitude at sea - a problem that had caused countless shipwrecks. 📚 Author Kathryn Lasky has written over 100 books for children and young adults, including the popular Guardians of Ga'Hoole series, which was adapted into a major motion picture. 🌊 Prior to Harrison's invention, sailors relied primarily on dead reckoning and celestial navigation, which were highly unreliable methods that often led to ships getting dangerously off course. ⏱️ Harrison's final chronometer, H4, was so precise it lost only 5 seconds over an 81-day sea voyage - an unprecedented level of accuracy that revolutionized maritime navigation and saved countless lives.