The Scarlet Thread by Mandy Rice-Davies

1914: Palestine's future hangs in the balance as Sara Levinson longingly awaits the return of Daniel Rosen, planning a life for two in the harsh beauty of their adopted homeland. But, young and idealistic, Daniel returns from Paris determined to forswear love as he strives to fulfill his own burning dreams for a Jewish state. The pages of the book of fate begin to turn more rapidly as the Great War sweeps over the crumbling Ottoman Empire, precipitating Sara and Daniel down paths they could never have forseen, bringing them not merely to the heart of their personal destinies but to a drama that will determine the future of the fledgling nation.