Need help with a SAS Book please


Full Registered User
Hi all I need help with a book that i lost i was reading when in the forces, it's a true story about 2 SAS guys one was from Merthyr Tydfil in Wales and the other from N/ireland best of friends and the one from Ireland leaves the forces and joins the IRA and they come face to face on an ambush or some attack I can't remember the full facts and some that i have mentioned maybe wrong, anyway I didn't get to finish the book and cant remember the name of it and desperately want to get it again to finish the book can anyone help?