I'm reading JACK: 1939 by Francine Matthews, a WWII adventure which features a young JFK in Europe, spying for the USA. This interests me because I've just put my own WWII spy thriller up on Amazon -with another celebrity protagonist: JUDY GARLAND; Operation Ruby Slipper. So far, we both have a Prologue...and the obligatory This is Your Mission Scene; Francine uses Roosevelt (FDR), in a basement railway tunnel beneath the Waldorf-Astoria hotel (I assume she's researched this). More prosaically, I have Judy meet Harry Hopkins in the White House. Francine sends JFK to Europe by luxury ocean liner; I have Judy board Howard Hughes Clipper sea-plane.  Francine has Jack attacked by a vicious Nazi on board ship, getting menace and confrontation in early on in her narrative. Judy doesn't get physically threatened until later in my story. Fascinating to compare the parallels. Will post again when I'm midway through Francine's book.