The Nautilus Sanction — Simon Hawke

Time travel can be extremely hazardous to your health. Especially if, like Major Lucas Priest, you're an-agent of the elite Temporal Corps. Anytime, anywhere, the Time Wars could begin again ...

Now the Nautilus, a Russian supersub armed with enough nuclear firepower to blow history apart at the seams, has been hijacked from the 27th century. Priest and his commandos clock back to pursue the sub, and come face-to-face with a man whose thirst for revenge is so great he would start the greatest war of all time -- everywhere at once!

To stop him, the Time Commandos have only the help of the Canadian fisherman Ned Land, and a middle-aged French writer of voyages ext-raordinaires named Jules Verne....