'Fed up of' versus 'Fed up with'

English as a Second Language English Vocabulary, Grammar and Idioms
1

Hi

I would like to know if there is any difference between:

1- I am fed up of writing this book which…
2- I am fed up with writing this book which…
3- I am fed up about writing this book which…

Tom

2

The difference is that ‘fed up of’ and ‘fed up about’ are not conventional expressions.