Reading [Serre's letter to Gray](http://books.google.de/books?id=4Vm4Lq1WSHgC&pg=RA1-PA722&lpg=RA1-PA722&dq=Jean-Pierre+Serre+%22Extensions+icosaedriques%22&source=bl&ots=CTXk-_vVqx&sig=kFq8FuyhYs7sGPOukgPe8kbQcBY&hl=de&ei=vXwvS8jxApjknAOiwY3PBA&sa=X&oi=book_result&ct=result&resnum=1&ved=0CA0Q6AEwAA#v=onepage&q=&f=false)
, I wonder if now modern expositions of the themes in [Klein's book](http://digital.library.cornell.edu/cgi/t/text/text-idx?c=math;cc=math;view=toc;subview=short;idno=03070001)
 exist. Do you know any?



Do there exist modern expositions of Klein's Icosahedron?
"Geometry of the Quintic" is available for free at my website.


Jerry Shurman


