The most popular ebook readers inherit from paper books the limiting concept of pagination. In electronic reading not only is pagination notoriously difficult for scientific/technical/medical (STM) but it locks content in one dimensionality of content consumption. We radically depart from pages and propose to split content into smaller, semantically self-contained 'tiles.' In contrast to pages, tiles can be more easily related to other tiles that can come from different books, GitHub repositories, StackOverflow discussions, Wikipedia, official documentation from the WWW, etc. Collections of documents from these other sources can be packaged as pre-tiled EPUB3 ebooks. The TopicStream app enables seamless navigation between book content & complementary documents without the need to explicitly open/close document collections. This approach adds value to commercial content in today's world where a lot of relevant information is available on-line.