Let me be perfectly clear here: I know about the editor, I use it frequently. It's overkill for what I would like to do.
I often spot typos in books while I'm reading. They're annoying, but fixing them is even more annoying, because I have to close the viewer, open the book in the editor, find the typo, correct it, save the change, close the editor, and reopen my book.
What I'd love to be able to do is select the error using the existing selection functionality, and choose "Replace" (or something similar) from the context menu. That would open a small text entry dialog. I'd type the correction and hit OK. Behind the scenes, the viewer would update the file, the same way it updates the file to track the current reading position.
Is this feasible, and would anyone else find it useful? Or am I the only obsessive around here?