How to Design Programs (htdp.org)

This was, along with SICP (http://mitpress.mit.edu/sicp/full-text/book/book.html), posted on the web long ago for free.

This was the text to my intro CS class in college. It's a really neat approach to introducing a range of students to software design that doesn't leave out more experienced programmers. It can feel like brainwashing at times, but it really helps tear down rotten foundations and build new, stronger ones.

I have both this and SICP in hardbound book format, I wonder if anyone has converted them to kindle format so I wouldn't have to buy another copy.

Which do you prefer (and why), HtDP or SICP?