Hello 

In case you want to help Pharo, we want to let you know that the chapter - Understanding message is available
https://github.com/SquareBracketAssociates/PharoByExample80/releases
We cannot post the chapter to this list :(

The authors thanks the sponsoring of ESUG because updating a book is not just changing 5.0 into 8.0.

You can send PRs at 
https://github.com/SquareBracketAssociates/PharoByExample80

The full pdf is available at 
https://github.com/SquareBracketAssociates/PharoByExample80/releases

If you want to support this effort:
- you can sponsor the book - you can get your logo on the book cover and be explicitly mentioned. 
The money will be split equally among the co-authors.

- you can sponsor me directly: 
https://www.paypal.com/donate/?token=Uoxj9sP4_jgUc6zUmTUc0-0AHbigd2v5CM1GqxlgTUw8GE7ke0KsCMJCziE981DFAqYdy0&country.x=US&locale.x=US

Stef