Nothing but the Truth — John T. Lescroart

When San Francisco attorney Dismas Hardy gets a call saying his wife never picked the kids up from school, he's worried. Frannie's a great mother. Turns out there's a good explanation: She's in jail.

Unbeknownst to her husband, Frannie has just appeared before a grand jury and refused to share a crucial piece of information about her friend Ron, who's accused of killing his wife. Now it's up to Dismas to race the clock and find a culprit, all the while wondering: Why would his wife go to jail to protect another man? Who really killed Bree Beaumont - and why? He's looking for the truth. But he's not quite sure he wants to find it....