Split Second by David Baldacci (2003)

This is the first book of the King and Maxwell series, where Sean King and Michele Maxwell have both worked for the Secret Service, but both have lost the presidential candidates they are supposed to be guarding. Their situations and lives intertwine, as they both work at solving the mysteries of what really happened. I liked both characters, but I have to say things got confusing, as I was listening to this book on a long ride. Way too many characters and variables, but still a fun read.