So if you want to advertise on here, email me at firstname.lastname@example.org with what you want or what you want to do and I will put it here.
People who want other gamebook related help
Demien Katz is always on the lookout for data entry volunteers for his amazing website, www.gamebooks.org. Contact him at email@example.com.
People who are looking for gamebook writers
The people at Playtinum who have made many many great games are looking to make gamebook apps. They are looking for gamebook writers to pay to make gamebook apps. If you are interested, you can contact Harshad Arole at firstname.lastname@example.org.
People offering to help with gamebooks in other ways
Karl is a professional proofreader, with a little extra time on his hands, who has offered to waive the standard fees for anyone who is writing a gamebook (in English) and would like it proofread. For more information, or to take him up on the offer while he still has time, email him at email@example.com.
People who are willing to write gamebooks
Victor Cheng has written In the Footsteps of a Hero (you can get the doc version here or play online here), Kill the Beast and From the Shadows (in collaboration with others).
If you would like Victor to write a gamebook, email him at firstname.lastname@example.org.