TimeRiders Day of the Predator Book 2 by Alex Scarrow

Liam OConnor should have died at sea in 1912. Maddy Carter should have died on a plane in 2010. Sal Vikram should have died in a fire in 2029. Yet moments before death someone mysteriously appeared and said Take my hand ... But all three have been given a second chance to work for an agency that noone knows exists. Paperback softback