I liked this mystery of a pilot whose death is initially written off as an accident a great deal. And I was glad I persevered past the point where there seemed to be a plot hole the size of the Grand Canyon, because the sleuths spotted their mistake and redeemed themselves pretty thoroughly. The tale is humorous, and entertaining - and while it's not that difficult to work out some of the plot, at least the reader's suspicions are confirmed stylishly and without dragging things out for long.