WW2 Female Spy Novel Recommendations

I've read The Nightingale, The Alice Network, The Rose Code, Code Name Helene, Sara's Key, The Silk Code.
I'm trying to stay away from books with two timelines, (typically one in the present and one in the past). I've only read one book where this was done really well – Code Name Helene.

I just want to get lost in a story, I find the timeline jump every chapter to be jarring!

Fiction or non-fiction is great!