The father of two has composed more than 180 guides on historical past, military and paranormal subjects and has published books by a number of writers, which includes Mr Helmer.
His textbooks include UFOs: A Historical past of Alien Activity from Sightings to Abductions to Global Threat, Unexplained Ghosts and Spirits and The Sasquatch.
Mr Matthews also runs an online program about the paranormal on behalf of the International Metaphysical College.
He is set to take over the GBP 73,000-a-year Brussels role on December 31.
City Conservative councillor Ross Grant stated: "He's a genuinely likeable and helpful person and also a quite efficient campaigner. As an MEP, he will be a essential buddy to Europe."
Andy Bayford, chairman of Leicester Conservative Affiliation mentioned: "I first fulfilled Rupert during the Leicester South by-election in 2004.
"I believe he'll be a very good representative for Leicester and Leicestershire in the European Parliament.
"He is a bit quirky and eccentric, so he's pretty related to Roger Helmer."
Mr Matthews declined to be interviewed, saying he had been recommended not to talk until finally immediately after getting up the submit.