Please search thru entire book for incorrect use of “it’s”
I found another one.
Page 338:
a function that would change the type or value of the Functor without changing it’s underlying structure.
===> should read
a function that would change the type or value of the Functor without changing its underlying structure.
In fact this markdown editor flags the error by showing “it’s” in red. Any program, like Microsoft Word will highlight the error.