To edit an existing book which you made using Blurb's Book Creator InDesign plug-in, please do the following:
1. Open InDesign and go to File > Blurb Book Creator
2. Click the name of the book you want to edit under Your Recent Projects, then click the pencil icon in Step 3: Document Files.
3. If you see an error message that "Your pages document cannot be opened because it cannot be found," this means your file was moved from its previous location.
To find and open your file, select the chain link icon to the left of the pencil icon to relink your template. If you have multiple books on your computer, be sure to choose and open the correct pages and cover templates or they may fail our preflight check.