This grid set is designed to help users navigate the electronic books provided through the free Kindle for PC application. This can be downloaded via Amazon and complements their popular E-Book Reader. books must first be downloaded (pay for, free samples, or free out of copyright books) via the Amazon Kindle website or a number of other sites that can also provide content. WARNING please note that Kindle does tend to update regularly and in the past the keyboard shorcuts and program location (where the program installs to) have changed. This would then mean that some minor changes would be required in the Grid. It is possible to turn off the Kindle Automatic updates in; Tools/Options/General and turn off automatic updates.