Reagan's War by Peter Schweizer. Takes you from start to finish and hits all points in between. Best Reagan book I've read and I've read a lot of them.
Another good one Ronald Reagan by Dinseh D'Souza.
I didn't care for Reagan's war. The writer left out the shooting down of KAL 007 and wrote the whole thing like he was sifting through documents. Plus he has Proxmire as a Republican, a real factual error if I've ever seen one.