In fact, in my ignorance I did not know that she had written anything other than Eats Shoots & Leaves.
I found this information recently, whilst perusing a 1994 copy of Gardens Illustrated, in which she was interviewed. Yes, as well as old books, I read old magazines as well - I should get out more.
Such is the power and wonder of the internet that I was able to get hold of a copy not only very quickly, but also very cheaply, although I got stung a bit on the postage.
The book itself (a 2004 reprint of the '94 original) is an amusing comic novel, ideal for a holiday and was a welcome piece of froth when I had some dead time to fill and wasn’t in the mood to concentrate intensively.
It's not perhaps as good as the master of the field Carl Hiassen (what is?), but it put me in mind of the books by that author, being populated as it was by all sorts of loonies, which is quite surprising since it revolves around the staff of a gardening magazine.
Ooh hang on, I must go and check if Lynne Truss ever worked for Amateur Gardening.