TDPL ebook

[Jeff Nowakowski]

On 08/21/2010 03:32 AM, Norbert Nemec wrote:
> I really appreciated the way Peter Langtangen handled this for his book
> "Python Scripting for Computational Science": There is an encrypted PDF
> for download for which you need a password like "Enter the first word on
> page XXX".
>
> Of course such a measure can still be worked around, but it is
> sufficient barrier that the PDF will not easily spread around and the
> protection is non-intrusive enough to allow people who purchased the
> paperback to have the PDF for reference.

The Peter Langtangen book you mention is easily found on the net, no 
password required. Frankly, if your book isn't available as a piratable 
PDF, your book is a failure -- meaning there isn't sufficient interest 
for people to pirate it. I'm not condoning copyright infringement, I'm 
just stating facts.