The cult musician will return to the country for two gigs this summer
Two companies are debating over the rights to the singer's 1970s' material
The folk singer released two 1970s albums which became best-sellers without his knowledge
The 'Searching For Sugar Man' star was praised for his 'musical genius'
Cult singer to record first album since 1971
Singer behind Oscar-nominated film will also play London's Royal Albert Hall