Event Type: single-event

Join us for a weekend of science fiction, fantasy, and horror! If you are a dealer, artist or participant, please click here, and then contact the appropriate person/group. Think you might already be registered? Click here to check, using our experimental registration lookup tool. NOTE: By registering for COSine and providing us with an email, Read more

Use the signup here to purchase advertising in our program book. Important: Please contact us at info@cosinecon.org before paying for advertising. If you do not, we cannot guarantee that space is really available in the program book. Ad details The program book is 7″ wide by 8 1/2″ tall, but there is a 1/2″ border, Read more

You can use this page to purchase a participant registration for COSine. Because COSine is a small convention, we cannot afford to give away memberships except to our Guests of Honor (the con committee and the staff also buy their own memberships). However, participants do get a reduced cost membership. Please only purchase participant memberships Read more

Use the sign-up here to purchase an artist membership and panels/tables for COSine. Important: Please contact the art show director at artshow@cosinecon.org BEFORE paying for artist membership and panels/tables. There are a limited number of spaces available. Note: You may be asked for contact information about your panels/tables. If so, please duplicate your information, and Read more

Secret location for registering the guests of honor. If you are here and you are not on the COSine Con Com you are a naughty person and should go somewhere else!! NOTE: By registering for COSine and providing us with an email, you are opting in to be contacted with information pertinent to COSine and Read more