Currently reading Massie's "Dreadnought", a sweeping historical overview of the lead-up to WWI, which I'm seeing as a prequel to his excellent WWI naval survey "Castles of Steel". I love his writing style and treatment of personalities in his books - really fleshes out the history and makes it more than just technology and politics, and more than just about the German and British navies.
Also picked up Gannon's "Operation Drumbeat" and "Black May". Subjects need little explanation - looking forward to these