Circular wall mounted bookcase design

Hi all.
I want to build a circular bookcase for my room.
As I have imagined it so far,it wil comprise 3 or 4 homocentric
circles of variable
radius so as books of 2 or 3 different sizes will fit in.Inside the
circles I will place the appropriate bookstands.
Does anybody have a similar design to send me?Any suggestions for the
construction?I have built one regular bookcase before,but have no
experience whatsoever with what I want to build.
(The wood for the bookcase will be supplied already bent so bending is
not a problem..)
Thanks for any help
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