Back in the 1967, Profile Publications published a 16 pages booklet about the Morgan Plus 4, which was still in production then.
It covered all aspects of recent history, including the +4+  +4 Super Sports, the SLR and of course the Le Mans class win. 
There even are two colour pages with drawings of a flat rad Drophead Coupé  JNP 239 and also the famous TOK 258.
Essential for any Morgan enthusiast!