The Puzzled Heart by Amanda Cross

This mystery puts Kate Fansler in an uncomfortable position: her husband Reed has been kidnapped, and the kidnappers have threatened to kill him if Kate doesn't publicly renounce her feminist viewpoints. Instead of calling the police, or taking a particularly active role in the investigations herself, Kate starts with a friend from her last case who has since become a private eye. But Kate quickly realizes that she'll be happier and more successful if she takes a stronger hand in the case. I really enjoyed the introduction of a dog into the Fansler-Amhearst household, and I thought Kate's reaction, while frustrating, was also reasonable as this case was so much more personal than her previous cases. I'm conflicted about the full plot though: it may have been a bit overcomplicated. Still, another fine entry in this series.