It would be useful if the search template could be a bit more versatile. Say searching for an author both as author and author2 in the book templates and showing only one result.

I also sometimes wonder when the template actually finds a book and when not, I added a whole lot of ! to book templates which was superfluous it seems - but even refreshing the template doesn't help if I don't make an edit (even an empty one) one the page in question.