|For other uses, see Harold (disambiguation).|
Harold, re-titled Harold the Helicopter in 2011 and Percy and Harold's Big Race in 2015, is the twenty-third book in the My Thomas Story Library series.
Harold boasts that he can go faster than steam engines, but Percy soon proves him wrong with a race to the harbour.
- This book is based on the story, "Percy and Harold" from the Railway Series book, Percy the Small Engine.
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