Author(s): H. I. Larry
Zac is sent to the Great Icy Pole to discover who is attacking the world's petrol tankers. It's a freezing, scary place. The area is so remote, if Zac misses his helicopter ride back, he'll be stuck there all winter!
The author of the Zac Power series, H.I. Larry's identity remains a secret even to his publishers. Rumoured to be an ex-spy, or someone high up in the G.I.B, H.I. Larry's manuscripts (which are delivered in unmarked envelopes) are said to be based on the real-life experiences of a 12-year-old-spy.