Appleby and the Ospreys

>Sir John Appleby's country weekend has been rudely interrupted by murder.... >Someone stabbed Lord Osprey with an Oriental dagger right in the library of his ancestral home, Clusters. Immediately, the police suspect one of Lord Osprey's eccentric house guests. Is it Lord Osprey's brother- in-law, Marcus Broadwater? Or coin expert, Lady Honoria Wimpole? Or Miss Minnychip, the other coin expert? Or perhaps Mr. Trumfitt, the outraged publican? It falls to Sir John, helped by Lord Osprey's faithful butler Bagot, to sort through the mysterious clues and find this clever killer.