I check the information of the pdf file by
pdfinfo the pdf file:
Creator: pdftk 1.12 - www.pdftk.com Producer: itext-paulo (lowagie.com)[JDK1.1] - build 132 CreationDate: Mon Mar 20 14:07:22 2006 ModDate: Mon Mar 20 14:07:22 2006 Tagged: no Form: none Pages: 565 Encrypted: no Page size: 612 x 792 pts (letter) Page rot: 0 File size: 6657623 bytes Optimized: no PDF version: 1.5
I don't know pdftk can create pdf files from webpages. I guess it was created by some other way (which can add number to left bottom of each page), and then processed by pdftk. But I am happy to be wrong.
I like to know how that can be created (so long ago), because I would like to have a pdf file from the newer version of the book.