Hamlet murder mysteries

[shewhomust]

I've been reading jill Paton Walsh's The Bad Quarto, and thinking about Hamlet murder mysteries - not Hamlet itself seen as murder mystery (despite Thurber's suggestion), but crime novels which centre on a production of the play. In addition to The Bad Quarto, there's Jo Walton's Ha'penny, whose cross-cast production had me so fascinated that I caught myself hoping that events would not come to a head before I had had a chance to enjoy the first night. Then there's Michael Innes' Hamlet, Revenge!, which I've read but about which I remember nothing. But why can't I find anything by Ngaio Marsh? Several of her books are set in theatres, she directed at least one production of Hamlet - did she really never write about it?