Rudy Rucker has a new book. Doctorow declares it "vintage Rucker."

Snippets from reviews:

Alt-cultural folk strive to save Earth from digitized doom ...

A computer mogul's threat to replace messy reality with clean virtuality and by a memory-hungry artificial intelligence called the Big Pig propels nanotechnologist Ond Lutter, his autistic son, Chu, and their allies on an interdimensional quest for a golden harp, the Lost Chord, strung with hypertubes that can unroll the eighth dimension and unleash limitless computing power.

Rucker takes on the volatile field of nanotechnology and the presumed inevitable "singularity" of human and computer unification.

More here, including (next month) the novel itself.