I do hate it when a book is littered with errors. I have a couple of funny stories about books and errors.
Quite a few years ago, I read about a local woman who had published a book. She had quite a bit of publicity about her publication, so I contacted her and invited her to be a guest speaker at a function for our local writing group. It was an afternoon event on a Saturday, and I found one of the other members to chair the event, and I did the catering. (I had had my own catering business some years earlier so it was an easy task for me.)
I was able to listen to the talk as I quietly arranged the food, cups and saucers, tea, coffee etc, and I learned that there were two printings of her work. The first one had too many errors in it.
At the end of the event, she asked if I had bought the book, and I said I had not as I had inadequate cash as I had used my funds for the catering. She handed me a book and said, "Pay me later."
A day or two later I picked up the book to read it. I was horrified at the number of errors I found in the first few pages. I phoned the lady, assuming that I had one of the first print run. She was adamant that there were no errors in the second edition and was a bit put out by my claim that I had identified many!!
I did go on to read it all, with my pencil in hand, circled all the errors I found. There were many. As an example, a character, a doctor, had his name spelled three different ways. The protagonist had travelled from Melbourne to Brisbane in a car, which amazingly did the journey almost as fast as a plane, and a skeleton had a muscle spasm. And on and on the errors went, and I sent an email to the author listing the page numbers and the errors.
She was not amused!!! She told me to burn the book. I did not, but used it for several years in workshops I conducted, as an example of getting a good editor. In amongst our exchanges of conversation, she told me that she had paid $1000 for an editor's services! OMG.
Another writer told me about her ebook, which I bought, and after a few pages, I found it difficult to read as error after error (spelling, punctuation, over repeated words etc) and I phoned her. As she was a friend I visited her. She took me to her computer to have a look at her words. We found that (a) she had done a spell-check, but had not 'saved' her work, and (b) so many words were repeated over and over, and many other errors.
I know I make mistakes. Often. However, I use Grammarly.
Each week I get a report on my writing. Most of my writing is checked by Grammarly as I write. My report for the last week includes this:
"You were more active than 96% of Grammarly users."
Your vocabulary was more dynamic (unique/total words) than 97% of Grammarly users."
I wonder what others get. If you would be interested in using Grammarly, go to the link here or the advertisement on this page.