This is the final beta. Production is complete. Now it’s on to layout and the printer.
Beta 6 has been copy edited.
Beta 4 includes two new chapters on lambda calculus: Chapter 24, “Calculus: No not that calculus, lambda calculus!” and Chapter 25, “Numbers, Booleans, and Recursion, Oh my!”
Many revisions to earlier chapters, including corrections to all outstanding errata as of March 13.
Initial beta release.