I haven't gotten this type of question in awhile, and finding the answer has never come this easily.
A young girl came up to me at the desk asked for "a blue book with fish bowl on cover." She couldn't remember the title except thought it was something like "one at a time." I asked her if she knew the author, and she said it was a blue book with fish bowl on cover. I asked her what the book was about, and she didn't know - she said her teacher was reading it to the class and she liked it.
So, I did a web search for blue book with fish bowl on cover, and the very first image in the results was exactly what she was looking for. Incredible.
I searched our catalog for Out of My Mind, only to find our copy was checked out. I offered to request it for her, but she declined. I hate that.
So the postscript is that this question is from May, apparently when this book (or at least, searches for this book) was more popular. It really was the first search result, and that's what shocked me and made me think it was a post-worthy reference question. I mean, how often does that happen?
While typing up this post though, I had to really look for the cover image in the results, as it had been bumped way down. Maybe I just got lucky, or that library serendipity was strong with me that day. Or maybe Google's search algorithms really are effective in making zeitgeisty things more prominent.
In any case, I could just have easily been asked this question this week, and the process of finding the answer would have been different - which I find interesting.
Update 8/27/14: A reader sent in this tip, which had not occurred to me: instead of including the word "blue" as a search term, try leaving it out and using Google color search tool. Much better results - thanks, Jessica!