Mike Osborne was the greatest exponent of the alto saxophone to come out of Britain - even considering such greats as Johnny Dankworth and Joe Harriott. No one has come close to the raw power that Osborne was able to control.
This CD combines two albums together: Borber Crossing (with Louis Moholo on drums and Harry Miller on bass) and Marcel's Muse (a quintet date adding Mark Charig on trumpet and Jeff green on guitar). Both albums are excellent with stunning solos throughout - Miller and Moholo especially - and Osborne shines in the border land between Hard-Bop and Free-form that was his speciality.
If you've never listened to Osborne before, his sound is distinctly his own but brings to mind late Coltrane, Jackie McLean and Albert Ayler.
If you're keen on British jazz of the 60s and 70s - or American from the same period - then you should regard this as essential listening.