Not By Strength by Guile

Only the best of the best are considered for the elite Special Boat Service. First, they undergo the rigours of SAS training; only then, if they are deemed fit enough, will they be considered for the unbelievable training that will gain them access to the SBS. With only two hundred members at any one time, it is the most secret and deadly special forces unit there is. Their tales of heroism and bravery defy belief; and nobody's tales are more astonishing than those of the author, Pete Mercer, who operated in Northern Ireland, war-torn Somalia and the Gulf.

Pete Mercer was a member of the toughest regiment there is - the Special Boat Service. He was part of the most dangerous operations that not even the SAS could handle, in the most difficult conditions imaginable.