The American Agent by Jacqueline Winspear

Maisie Dobbs is back again.  She's working as a ambulance driver for the emergency response teams responding to bomb blasts.  It's volunteer work she does as her contribution during the war.  When a man from her past calls and asks if she will work on another case for him, she agrees.  But he doesn't tell her much...

Harper and Edelweiss let me read this book for review (thank you).  It will be published March 26th.

Maisie and her partner had taken a journalist with them so she could see just how awful all the bombing was.  America had not yet joined the war although Europe could use their help.  This journalist was trying to impress the American public with the horror of the war so they would pressure the politicians to help.  She manages that.  She even manages to get herself killed...

Her death is what they want Maisie to investigate. She even gets to work with another man from her past.  He's not telling her much either.  Secret service types don't share their secrets.  She works with him, she likes him, but she's not sure if she trusts him.  He ends up becoming her lover even though she was trying hard not to fall for him.

While she's investigating, talking to everyone that knew the deceased and trying to ferret out the killer, she's also applying to adopt the little orphan girl she took in.  Then her ambulance partner gets caught in a house fire where she went in to get two young children out.  Her burns are awful.  All of this is really stressful for Maisie but she's tough.

The worst part is when she finally identifies the killer.  The ending surprised me.  Did you figure it out?