The talented author of Crimson Friday makes an abrupt departure from the type of story she has done in the past. Now she offers a tale of furious action in which an attractive young American couple find themselves both the pursued and the pursuers in a spy plot as unusual as it is fiendish. Done with the finish and close attention to characterization which have marked all of Miss Disney's previous books, this one is a notable performance in suspense and excitement.

The best friend of Paul and Mary Strong, a photographer for the same news magazine for which Paul is a correspondent, is stuck in Iceland on his way back to America. In place of his 17th letter comes an envelope containing only a theater program from an unidentified city. That is the first intimation of anything amiss, but from the day of its arrival things happen at a breath-taking rate.

Readers will take Mary to their hearts. For all her youth and blonde beauty she is indefatigable in her pursuit of the mysterious menace that hangs over her husband and his friend. When Paul gets himself assigned to Iceland to investigate, she unhesitatingly stows away on the same ship because she has received a mysterious warning that "something is going to happen to the convoy." Not the least of the complications on board is a charge of murder brought against Mary and Paul by the captain. At Halifax the fun really begins because their problem is to get ashore and dodge the Mounties while they pursue the clue of the enigmatic theater program.