Ben Jeapes 
Time’s Chariot 

His last thought, as the stun charges lanced through him and he felt his body arch and then start its slow, dreamlike tumble down the stairs, was:What did I do wrong? Rico Garron is in trouble — again. What starts out as a routine expedition back to five thousand BC, turns into the first murder investigation for hundreds of years. A complex spiral of subterfuge, intrigue and powerplay begins to unravel, and now the entire future of the world is at stake . . .