[pfranz]

(I haven't gone through both) but I think HtDP and SICP are interchangeable-ish.

From the wikipedia page: HtDP was designed as a textbook to address certain issues that some students and teachers had with SICP.

[jm547ster]

Excuse my ignorance, what is HtDP?

[grzm]

"How to Design Programs"

http://www.htdp.org