According to wikipedia, 'The fictional title Biggles Flies Undone was mentioned at the end of "Biggles Dictates a Letter", but it was never produced' (Biggles Dictates a Letter I can't see on the list of Biggles books, but they do include 'Biggles Flies to Work', 'Biggles Goes Home', 'Biggles Does Some Homework', and 'Biggles Takes it Rough'.
(And 'Biggles Learns to Flie' was the 5th book...)
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According to wikipedia, 'The fictional title Biggles Flies Undone was mentioned at the end of "Biggles Dictates a Letter", but it was never produced' (Biggles Dictates a Letter I can't see on the list of Biggles books, but they do include 'Biggles Flies to Work', 'Biggles Goes Home', 'Biggles Does Some Homework', and 'Biggles Takes it Rough'.
(And 'Biggles Learns to Flie' was the 5th book...)
The Shopkeeper of Venice (I'm assuming we're allowed plays)
Oh yes, we're allowed plays
The World According to Gap