This is an update to my previous all-in-one PDF iPhone / iPad reader roundup published HERE.
I haven't elaborated on some subjects in the original article. Let's take a closer look at them.
1.) JPEG2000 images embedded in PDF files with aren't supported – they simply aren't shown.
To quickly fix this issue, before transferring the file to your iOS device, just open it in OS X's Preview and select File / Save As.
An example of this showing the page of Building iPhone OS Accessories Devices by Apress with the missing images (click the images for the full-sized version of much better quality):