"Pragmatic Thinking and Learning" was Andy Hunt, but as he and Dave Thomas are kind of a double act I can see why you'd get mixed up.
As to your point about whether they wrote any books on 'agile' I think it could be argued either way. More specifically, whether or not "The Pragmatic Programmer" (the book they made their name with) counts as a book about 'agile' is an interesting question, and one that throws some light on the wider debate.
Although they sometimes talk about "pragmatic programming" as if it were a thing, in the same way as XP and Scrum, their approach was more one of giving a smorgasbord of potentially useful techniques and practices rather than codifying a tightly defined set of best practices.
As to your point about whether they wrote any books on 'agile' I think it could be argued either way. More specifically, whether or not "The Pragmatic Programmer" (the book they made their name with) counts as a book about 'agile' is an interesting question, and one that throws some light on the wider debate.
Although they sometimes talk about "pragmatic programming" as if it were a thing, in the same way as XP and Scrum, their approach was more one of giving a smorgasbord of potentially useful techniques and practices rather than codifying a tightly defined set of best practices.