Off topic, but what kind of ego does it take to write an introduction that gets your name on the cover of an abridged edition? Certainly, a writer might conceive of a work as having 10 chapters and being complete, only for a publisher to demand 3 more to satisfy the expectations of the market or some literary superstition. But having been written, the text exists. It seems extremely presumptuous to me for a literary critic to take on the curatorial role and say 'you don't need to read the last quarter of the book, it's boring/repetitive.'

A book of that stature being published cutailed in any way should be carefully avoided by all readers.

The 'Canadian Gutenburg' PD version [0] mentioned in another comment here contains all 16 chapters. ('Star Maker' is also there, as is 'Last Men in London', 'Odd John', and more.

[0] https://www.fadedpage.com/showbook.php?pid=20200531

This is definitely not the first printed edition to omit those chapters. There’s a story there and I don’t know what it is.