The easiest way to manage Kindle collections is by using the Amazon Cloud Collections feature to organize the content into custom categories and store them in the cloud. This method allows Kindle users to add an unlimited number of books and personal documents to each collection. The downside of this method is that it’s only available on sixth and seventh generation Kindle devices, including regular, Paperwhite and Voyage models, as of 2015.
To manage existing collections, access the home screen, tap the name of the collection you wish to manage, and select the appropriate option to rename, delete or modify the content within the collection. If you delete a collection created via the Cloud Collections feature, other devices that you have registered to the same Amazon account also lose access to it. After deleting a collection, its content appears on the home screen instead of getting removed from the device.
To customize the way of accessing Kindle collections, filter the items that appear on the home screen by tapping the All Items option, and then tapping Collections. To create a new collection, tap the Menu icon, tap the Create New Collection option, select a name for the collection, and tap OK. Once the list of content stored on your Kindle device appears, tap the checkboxes next to the content you want to add to the new collection, and tap Done.