David HirzelDavid Hirzel, a Californian native, is an author, historian and small business owner. He has written a three-part polar biography of the Irish explorer Tom Crean, a key player in Scott's and Shackleton's expeditions. The final book of this series, Anarctic Voyager, was launched at the South-Polesium conference in Scotland (May 2015). David's book, Sailor on Ice: Tom Crean with Scott in the Antarctic, has been optioned for a documentary. Read More Read Less