Hello Jeff,

Start with one of the originals (and best in my opinion);

Morgan - First and Last of The Real Sports Cars
Gregory Houston Bowden
Published 1972, 1973, 1986.
Foulis/Haynes
ISBN 0 85429 443 0

Also worth a look;
The Four-Wheeled Morgan
Ken Hill
Motor Racing Publications

Vol 1 - The Flat-Radiator Models
1977 ISBN 0 900549 31 9

Vol 2 - The Cowled-Radiator Models
1980 ISBN 0 900549 54 8

Have Fun !
Andy