Re: Question about the package directive

Roedy Green wrote:
....
> Ideally you skim the book before purchasing to make sure it has
> examples that interest you, and are complete.  The book should have
> the Goldilocks property of difficulty.  Picking one too easy or too
> hard FOR YOU is a waste of money.
....

I do two checks when picking a book for self-education:

1. Read some pages near the start of the book. Reject, at least
temporarily, if I don't understand them. I may reconsider after reading
a more basic book on the same subject.

2. Dip into later chapters. Reject if they only cover material I already
understand.

The idea is that my knowledge of the subject should increase in the
process of reading the book.

Patricia