I find Amazon's search to be worthless. Frequently, I search for a book with author's name. Frequently, that book does not show up. On more than a few occasions

I find Amazon's search to be worthless. Frequently, I search for a book with author's name. Frequently, that book does not show up. On more than a few occasions, it would be on the 2nd page of search "results" (most of page 1 are "sponsored" = adverts). Now, I just use Google and that results in the book I'm looking for. On other things, I find Google returning less than useful results when searching for things.