Removing sidebar for specific pages

I’m using the IKON 1.0 theme at http://www.geldpress.com, and I have an amzazon bookstore at http://www.geldpress.com/bookstore

But I don’t want the bookstore page to have a sidebar, and I also want the bookstore page to be much wider. All other pages can remain the same default settings as per the IKON theme.

Any guidance is appreciated.