Spy novel with a twist: “The Most Difficult Thing” by Charlotte Philby

it should have been the surname “Philby” that could have drawn my attention, juggling the memory. But Charlotte Philby’s book cover was what riveted me in the first place, making me pause by the shelf on which it stood at Waterstone’s. A striking black and white image punctuated with a lemony shade of yellow – simplicity and riot colliding. I pulled the…