Selina, if I'm right Harry didn't want to advise you to buy the iPad but just wanted to assure you that the resolution of the A9 is sufficient to read pdf files with illustrations.
Hanlin has a lot of 6" devices out, you can inform yourself about their quality in the Hanlin subforum or ask some questions there.
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https://www.mobileread.com/forums/forumdisplay.php?f=101)
As it seems there's only one member here who has written about the A9
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https://www.mobileread.com/forums/sho...5&postcount=39)
I own the PB902 and I'm quite satisfied with this device. I mostly use it for reading pdf files.