Asymetrix Corporation
Official information about ToolBook

The ToolBook List
A Listserv resource for Asymetrix ToolBook users.
You can subscribe to mailing list devoted to ToolBook there. You can also browse archive of messages on this site.
And there is very good section of FAQs sorted by themes

ToolBook URL Depository
Good FAQs and links

ToolBook Workshop
Another Russian site about ToolBook: tools, scripts, tips.

ZuK
Homepage of Alexander V. Kuznetsov - developer of multimedia textbooks, coaches, tests, laboratories, training and games.

ToolBook Things by Denny Dedmore
Tips and Utilities

ToolBook Tools, Demos and 'Other Stuff' by Slade Mitchell
Very interesting articles and other information

Australian ToolBook User Group by Andy Bulka
ToolBook Tips Magazine, ToolBook Web Sites Reviews and other interesting things

Marty Weller's ToolBook Samples
A lot of sample books for every version of ToolBook

Dr. Cecil Cheah Home Page
Job postings for ToolBookers

Quarta Technology
Distributor of ToolBook II (Instructor, Assistant and Libririan) in Russia.

I don't put here all other links to ToolBook resources. If you want to see complete list of links go to the site of Marcio d'Avila:
Marcio's ToolBook & Multimedia Hotlist