typo

add extra section for shell-deferring

typo

remove "continues now". It feels awkward

link to py2guile

add dir-function

nagware: say version, not preview, to avoid looking like the book stops here

only nag before one in 3 chapters, selected at random

Nagging before each chapter seriously impedes on the reading experience.

add 'continues now' to nagware to ensure that people don't drop out

Make nag page clickable.

fix abstract in title: must use lowercase begin_abstract.

add nagware for the free preview

regular font for authors is better readable

fix links

polish text

Add free preview note to the info.

add the link to the book.

add ebook ISBN

this is

only up to 6 levels of headlines (epub does not support more)