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):
Utilities improve or extend the capabilities of your device—in sometimes simple and often unique ways. In this section you'll find apps that help you tune musical instruments, convert measurements, track shipping, plan your garden, track and manage the battery and memory of your iPhone, and a lot more. There are almost 9,000 of these useful apps available, and most of them are very inexpensive.