In the wake of a referendum which has divided the nation, the last thing the Queen needs is any additional problems to worry about. But when a body is found in the Buckingham Palace swimming pool, she finds herself once again in the middle of a murder investigation which even her best detectives can't crack. With her trusted secretary Rozie by her side, the Queen is determined to solve the case. But when an oil painting of the Royal Yacht Britannia - first given to the Queen in the 1950s - shows up unexpectedly in a Royal Navy exhibition, she begins to realise that there is more to this murder than she could ever have suspected . . .Miss Marple meets The Crown in A THREE DOG PROBLEM, the much-anticipated second book in the 'Her Majesty The Queen Investigates' mystery series by SJ Bennett - for fans of The Thursday Murder Club by Richard Osman, Agatha Christie and M.C. Beaton's Agatha Raisin.