This engrossing book tells of a failed 1921 mission to colonize Wrangel Island that left four men dead and Ada Blackjack, a young Inuit seamstress, alone in the arctic wilderness for six months. Only recently has the full story come to light, and this is the definitive account, drawn from Ada's diary and testimony, along with other historical documents and interviews. A sequel of sorts to Niven's Ice Master, the tale of another ill-fated expedition lead by Vilhjalmur Steffanson.  (ALA196, $14.95)