Typewriter font with ligatures?

[gwpriester]

My wife and I are presently reading a book, The Silence by Don Delillo. The book is designed by a very trendy outfit in New York http://paulsahre.com/

The book which is very short is set entirely in what looks similar to American Typewriter. But the designer has used ligatures. I have to wonder, he is a youngish designer, if he even realizes that typewriters did not have ligatures or if he just automatically had ligatures enabled as a default setting.

Sticks out like a hog on a sofa to me but probably not to a generation that have never known typewriters.

Attached is an example I did with American Typewriter.