In the Introduction to "Destroyer from America," first published in 1942, author John Fernald writes, "It is not always realized what a comparatively small proportion of our sailors are fated to take part in the obvious heroics of battle. Neither is it always understood that Boredom, more often than not, is the serviceman's greatest enemy." Sadly, this book -- where nothing much happens -- does too fine a job showing how true both those observations are.
John B. Fernald served in the Royal Navy Volunteer Reserve during the war, aboard the HMS Newmarket, formerly USS Robinson (DD-88) of the US Navy, one of the four-stacker tin cans sent to the British in the "destroyers for bases" arrangement. This book is therefore to some degree autobiographical. It's interesting from that standpoint, and the authentic RN feel is definitely there. But compared to, say, a more recent novel by Douglas Reeman, also an RN veteran of the war, the story told just isn't very exciting.
Read this, therefore, for the atmosphere and authenticity if you like. If you're looking for a thrilling war novel, however, I'd recommend Reeman or an author like him instead.