One of the aspects of PDF production to which we pay careful attention when creating Take Control ebooks is the size of our PDF files. It may not seem as though a few megabytes matter in today's Internet, but you'd be surprised how many people still work on limited bandwidth connections, and, in fact, the increased use of cellular data connections for iPhones and iPads has made the problem of unnecessarily large files even worse. Plus, email servers often reject attachments over 5 MB, providing yet another reason to compress PDFs. Image-heavy PDFs generated from programs like Keynote and PowerPoint tend to be especially massive, but it's nearly impossible to predict when a PDF might balloon in size. Some of our Take Control ebooks have hit 100 MB before we shrink them to between 1 and 5 MB.
We compress our ebook PDFs using Apago's industrial-strength PDF Enhancer, which also performs other tasks for us. But if you just want to reduce the size of PDFs quickly and easily, Apago's $35 PDF Shrink is all you need. Drop your PDF file on PDF Shrink, and it quickly compresses images in the PDF, and performs various other manipulations that save space while still producing a fully functional and compatible PDF (something that's not true of all tools that can reduce PDF file sizes). You don't need to understand the inner workings of PDF to choose appropriate settings; PDF Shrink takes advantage of multi-core CPUs to process multiple files at once; and you can even feed it an entire folder to process a large number of files in one action.