Looking for a book by P. T. Barnum

The title is : “The Adventures of an Adventurer” (1841).

I’ve located one book that has excerpts.

Can anybody steer me to a complete (and affordable_) reprint volume?

Based on my casual searching, I don’t see any evidence that it was ever necessarily even published in book form. It was published as a serial in the New York Atlas.

What you could do is try to get one of the New York libraries or museums that has it on microfilm to digitize it for you. That may or may not be affordable depending on what they’re charging these days and how many reels you’d need to get the whole thing. Here’s a list of libraries that have it (search for the 1840 version of The Atlas): New York State Newspapers : New York County (NY) newspapers on microfilm and paper at all NYS locations