Solo, a “James Bond Novel,” is the latest in a series of post-Ian Fleming books written by different authors (Kingsley Amis, Jeffrey Deaver, Sebastian Faulks, etc.). Now it’s William Boyd’s turn. Boyd, the hugely gifted author of Any Human Heart and the accomplished thrillers Restless and Ordinary Thunderstorms, certainly seems on paper like a great fit to extend Fleming’s legacy, breathing new life into this decades-old franchise. From the start of Solo, the tone feels different.