Seasons of Change — Julian Jay Savarin

Featuring Hauptkommissar Muller and his sidekick, Pappenheim. In Australia following the trail of an important informant on the shadowy organization threatening German democracy, Muller is disturbed by troubling memories, and a puzzling sense of deja vu. But he must keep his wits about him, as he knows he has been followed, and those he is trying to uncover have already sent one sniper to put an end to his investigations . . .