Vitage book- More Mini Tuning by Clive Trickey 2nd edition. 
Published by Speedsport Motobooks in 1968, 2nd edition
The cover is worn on the corners and edges. Binding has worn out, some pages are loose.
This is a detailed and well illustrated technical book. 
It has sections on:
Carburetters
Camshaft design and practical application 
Lightening valve gear
Changing oil pump types
Gearboxes
Interchangeability
Ignition and generator
Tuning for economy
Modifyications for alcohol fuel
Non-Cooper S 1275cc units