Cory_4

Everything that is withing your niche - this page mentions some really great white hat strategies - https://www.quicksprout.com/the-advanced-guide-to-link-building/

skyscraper technique (outreach); creating great content so other people want to link back to you

I think I would probably also prefer a flipbook (they are way more interactive). As you mentioned, you can send your customers the link to your flipbook and much more. under point 2 "why should I create a HTML5 flipping book" you can find a good explenation on why it …