I finished reading a short biography of Jimmy Carter by Julian E. Zelizer, part of the "American Presidents" series published by Times Books, an offshoot of Henry Holt and Company, and I've moved on to Grover Cleveland by Henry F. Graff. It's likely that all you might know about Cleveland is that he was the only president to serve two non-consecutive terms, as our 22nd and 24th president.
After I transcribe what I need from each book in this series of books (and so far, I'm on the third book, though not in any particular order), I find the "selected bibliography" to be incredibly valuable. I open up a new Word file and save it as, say, "Jimmy Carter - Books" and enter into it whatever books the author used to write that book, those books that would be useful to me. I could use Amazon for the same purpose, but it's better for me this way to get a sense of the books that authors relied on, and also I don't always have to scroll through personally uncharted territory.
Instead of waiting until I'm done with this Grover Cleveland biography to make the "Grover Cleveland - Books" file, I decided to do it now since there's not a lot of books in the "selected bibliography" section, being that Cleveland wasn't as widely written about as, say, Lincoln or Kennedy or Clinton. There's another book titled Grover Cleveland that was published in 1968, and I love the name of the author: Rexford Guy Tugwell. It should be the name of a character in some whimsical novel.