It is inspired by SICP, but in the sense that it fixes what the authors consider to be problems with SICP's approach. They've published various papers on their

It is inspired by SICP, but in the sense that it fixes what the authors consider to be problems with SICP's approach. They've published various papers on their criticisms of SICP, eg http://www.ccs.neu.edu/scheme/pubs/jfp2004-fffk.pdf http://www.ccs.neu.edu/scheme/pubs/jfp2004-fffk.pdf