This is a linkpost for https://nanosyste.ms
You can read the book on nanosyste.ms.
The book won the 1992 Award for Best Computer Science Book. The AI safety community often references it, as it describes a lower bound on what intelligence should probably be able to achieve.
Previously, you could only physically buy the book or read a PDF scan.
(Thanks to MIRI and Internet Archive for their scans.)