The Jim Jam Sessions Time and Space and Rock'n'Roll by Nigel Le Page

Paris, 2064: Music historian Anna Marchand is accidentally transported back in time to the year 1964. When the initial shock has subsided, she heads for London in search of the legendary 'Jim Jam Sessions', a rumoured set of unofficial recordings from the era. Meanwhile her friend Alex, whose makeshift time machine has caused her to disappear, searches frantically for a way to find her and bring her back to her own time.