Books for Maths PS too 'standard'?

So, basically, I've got my personal statement written up already but I'm starting to have doubts about whether the books I've included are sufficient. They are Hardy's A Mathematician's Apology and Simon Singh's Fermat's Enigma. It seems, however, that these are routinely mentioned in maths personal statements. The former bothers me especially because although it's pretty thought-provoking, it's very short so I don't know whether it'd be taken seriously. Thoughts on this?

Did you only read these to include in your PS? There are lots of Maths books - you need to draw out what you found interesting about any you name. Naming books isn't necessary anyway ..

Nope. Read them because a relative recommended them. And I did mention explicitly what I found interesting about each. I just feel like those two books in particular are often mentioned by students on their PS.