Graph visualizations elegantly depict links and connections, revealing patterns and relationships in ways not possible through raw data alone. But large graphs pose hard problems due to the difficulty in positioning large numbers of nodes while retaining readability, and the difficulty in navigating and analyzing such large structures. Solving these problems is necessary—graph visualizations are needed to make sense of the vast amounts of data being collected—and may lead to more interactive, intuitive viewers that make visualizations part of the data analysis itself.

Massive amounts of available programming, an array of accessory devices to manage and record the content, and electronic program guides for lookup: the result? Finding and watching a TV show has never been harder.

But new technologies and solutions—from voice remotes to connecting the household TV to powerful servers —aim to make TV viewing easy again.

Mapping book recommendations onto a fictitious topology, rather than simply listing them, makes it easier to see how nearby selections are similar. As a service to parents and kids everywhere, here are book suggestions based on Harry Potter. Click for the full image.