If you like to read a good book, you should defenatly read some from Chris Ryan.
Ryan joined SAS in 84, and was in the regiment for 10 years. He was onvolved in many covert ops and was also a sniper team commander. During the Gulf War, Ryan was the only member of a 8 man team to escape from Iraq. 3 team mates was killed, and 4 captured. This was the longes escape in the history of SAS.
Ryan have written some 25 - 30 books. The ones I have read is packed with action.