S.H.A.R.D [Book one]

This is just the prologue. [DISCLAIMER] Not of the best quality, this was written on a phone. First time posting here so why not with the beginning to my story I'm working on. Book one: S.H.A.R.D. Hal Andrews, a promising young field agent for an international security Division known as S.H.A.R.D. Strategic Homeland Advisory and Reconnaissance Division. They operate with jurisdiction over every country in the world. Only high ranking officials are aware of its full purpose. The public only knows it as a FBI type organization, and only those who qualify will ever get an offer. S.H.A.R.D's true purpose is to protect the inhabitants of earth and it was started by the remainders of an ancient alien civilization who's only main goal is to safeguard underdeveloped civilizations. They seeded the human population with the genetic code of their race and through a certain procedure can be activated and they will be in mind and body, Sentinel. A dark power is approaching earth with the sole intent on domination and slavery. The Reavers, the polar opposite of the Sentinels, they all but eliminated the Sentinels from existence. Now they have their sights set on earth and will stop at nothing to burn humanity to the ground. It is up to S.H.A.R.D and the Sentinel remnants to push back the hell that approaches. The secret of the Sentinels will be uncovered and it will change everything. -L.T