The Kindle version of The Question is finally up and available on the Amazon site (HERE). Due to formatting limitations, the eBook has fewer illustrations and lacks the elegant design of the print copy.
I consider the hard-copy book to be the definitive version and the Kindle version a secondary way of reading the text. If you first order the hard copy from Amazon they will throw in the Kindle for a ridiculously low price of $1.99 (see Matchbook price).
In whatever form you choose to read it, The Question will be well worth your time in my opinion.