Missing diagram or typo p98?

[Ivan Uemlianin]

Dear All

I think a diagram has gone astray from page 98. The fist para says,
"... contrast the bound variable Pid in figure 4-4 with the unbound
variable DigitList in figure 4-5, ..". There is a figure 4-5, but
it's not the one being referred to here.

Is there a missing figure, or could that be talking about the unbound
variable DigitList, also in figure 4-4? In which case that's a typo
in the text.

I think that's only the third typo I've come across so far (also p44:
boolean.erl for bool.erl; p58 unexplained ioExs), all fairly minor.
Three typos in a hundred pages is extremely impressive for a computer
book these days.

Best wishes

Ivan