Endnotes, they’re evil I tell you
In popular non-fiction, publishers seem to prefer end-notes to footnotes. When they want that little bit of scholarly sheen, they put footnote-worthy material into endnotes. This makes reading the books in question a big pain in the rear. I end up maintaining two bookmarks: one for where I’m up to in the main text, and another for the corresponding position in the end-notes.
I suppose the publishers feel that footnotes either look ugly on the page, or that they make a book look too off-putting when browsed. Either way, I wish they wouldn’t do it.