Will I retain the rights to my work?

Yes.

Under Canadian law, copyright in an original work automatically belongs to the person who created the work. Editing that work does not change the author’s copyright in the original work, but the editor could claim copyright in the edits.

Also, depending on the extent of editing, the edited version of the original work could be considered its own original work (sometimes known as a derivative work). Copyright in that changed version would rest with the editor. (See the Canadian Intellectual Property Office’s “Guide to Copyright” for more information: http://www.ic.gc.ca/eic/site/cipointernet-internetopic.nsf/eng/h_wr02281.html.)

Will my work be 100% error-free?

Editing is a process of offering advice and suggestions. While I will make every effort to identify and bring questionable material to your attention, it is not possible to guarantee error-free content.