Shameless Promotion---yet again
I know, I know...we have all said this before and will probably go on doing it, pointless as it seems to be.
But here goes, anyway.
The first example of your writing that anyone is going to see is the description you write for your blurb. If it is not letter-perfect, if the spelling, grammar and punctuation are not spot on, why in the world would a potential reader think that your book was written any more carefully? After all, if even that little bit of attention could not shown in writing a short paragraph, how much craftsmanship was spent on the book itself?
And when even the title of the book itself is misspelled...