I really agree with Alan - that reader is miserable. One problem is that it only offers steps of 100% - so you can see it at 100%, 200% etc. You really need to be able to scroll the magnification. At 100% on my screen I can't read it and at 200% it's too big which makes it hard to read (too much scrolling - and the scrolling bars don't work well).
They must have done NO beta testing on that reader or just ignored the feedback.
Go into the world and do well. But more importantly, go into the world and do good.