Tess Gerritsen: Call After Midnight (USA 2001)

From the publisher:
Newlywed Sarah Fontaine must join forces with special agent Nick O'Hara to find her husband Geoffrey, who is presumed dead, and as they journey to Europe to discover the truth, they become the pawns in a deadly game of international espionage.

Tess Gerritsen: Call After Midnight. The message is deadly. Mira Books, ISBN: 1551668343 (July, 2001), 250 p., $5.99.

Tess Gerritsen: Call After Midnight (USA 1987)

From the publisher:
Newlywed Sarah Fontaine begins a horrific nightmare following the phone call that tells her the news her husband Geoffrey has been killed in a hotel fire in Berlin. Convinced he's still alive, Sarah challenges special agent Nick O'Hara of the U.S. State Department to prove her wrong. As they crisscross Europe in a desperate search, they try to stay ahead of a dangerous killer.

Tess Gerritsen: Call After Midnight. Harlequin Books, ISBN: 0373220782 (November, 1987), 256 p., $2.50.