There's a lot of good information floating around the Web. That's a good thing. It's also a bad thing, since finding a few grains of wheat can require sifting a great deal of chaff. Search PDF helps you with that sifting when you need a book, ebook or instructional PDF.

Just open the Search PDF web page and enter a search phrase, book title, etc. From the list of returned links, you can open a direct link to the PDF (using your preferred viewer), or click View to preview the PDF using Scribd's iPaper (so there's no need to start up a separate piece of software on your machine). Search PDF is very much a single-purpose tool, but it does an excellent job of wading through the worst of the irrelevant material, helping you to narrow your searches more rapidly and effectlvely than a straight-up Google search.