Each template from Graphic Node was created with a theme in mind (Baking, DIY Interiors, Love Poetry, Travel Memoirs, etc). The layout of the template reflects what the author may find consistent or helpful based on the specific theme.
Unlike templates for websites, iBooks templates from different sources may be mixed and matched to create new combinations. Of course, not every layout combination will work, design-wise. However, the larger your template collection is, the more inspiration you will have to draw from, and (possibly) the easier it will be to assemble something which will work visually. Tomorrow, we will show the mechanics of how to combine elements from different templates into a single template. Of course, how to achieve a design which is visually coherent, thematically consistent, and/or esthetically appealing will be left as an exercise for the reader 🙂