A new book by Philip Hosken will be published by the Trevithick Society on Trevithick Day this year.
The book 'Genius, Richard Trevithick's Steam Engines' contains new research and clearly answers the greatest mystery in engineering history.
Its author Mr Hosken said: "We have been asked numerous times why, if Trevithick achieved so much, is he not better known?"
The release comes at a time when it has been confirmed that it was Trevithick, not James Watt, who invented the steam engine.
Recent television and radio broadcasts eventually vindicated Trevithick for his achievements after more than 200 years.
Not only did Trevithick develop the high-pressure steam engine for which Watt said he should have been hanged, but he built and demonstrated how it could be used on the road and to pull the first railway train.
Trevithick's engine owed nothing to its forerunners. It was completely new technology.
Its important feature was its cylindrical boiler that allowed the use of high-pressure steam.
In addition to powering most of the industrial and all the transport revolutions the Cornish engine pumped mines throughout the world and supplied clean drinking water to millions of people.
'Genius, Richard Trevithick's Steam Engines' is a book about 19th century intrigue and skulduggery.
It reveals deception in parliament and dispute in the royal society.
It replaces the myth and romanticism that has built up around Trevithick and accords him credit for his genius.
It will be available for just one day on the Trevithick Society stall on April 27 priced £6.
