To celebrate 60 years of The Yardbirds, Demon Records is proud to present a new series of 7" vinyl singles. Recorded in 1966, 'Mr. Zero' was the first solo single released by Yardbirds frontman Keith Relf. The band's manager, Giorgio Gomelsky, had proposed the idea that all the members should record a solo single, with Relf being first. Written by American folk singer Bob Lind and produced by Yardbird Paul Samwell-Smith, 'Mr. Zero' is a baroque pop gem and highlights Relf's haunting vocal style. The B-side features 'Knowing', an original song by Keith Relf written about his bride, April, whom he had married just a few months prior. Relf accompanies himself on autoharp, joined by Jeff Beck and Rick Jones on guitar duties. Reissued as a standalone single for the first time, both tracks have been mastered by Phil Kinrade and cut by Jasper Ward at AIR Mastering. Housed in a heavy-stock card sleeve featuring the rare French issue cover with spot UV detailing.