Probably available from Amazon
http://www.amazon.com/
HAND REEF AND STEER
TOM CUNCLIFFE
THE SHELL CHANNEL PILOT
TOM CUNCLIFF
THE GAFF RIG HANDBOOK
JOHN LEATHER
CLASSIC BOAT SEAMANSHIP
MARTIN TREGONING
Published by Adlard coles Nautical 1992
ISBN 0-7136-3606-8