This cuts rather close to the bone. I’ll confess to a certain flutter of elation when I discover a grammatical or spelling mistake in a book. If the book in question is in a second or higher edition, I may even give an audible cheer. “Sticklers of the world, unite! You have nothing to lose but your sense of perspective.”
I also confess that there are some grammatical situations in which I become confused. For instance:
(i) toward vs. towards, afterward vs. afterwards, etc. I’m never sure which is correct.
(ii) “He found that he, together with his friends, was confused about which conjugation to use.” Should that “was” be “were”?
I know there are those who wield their grammar hammer even more readily, and confidently, than I do. Perhaps they can help me along — gently?