Amazon has announced a Kindle update that will let you share books with someone else. The new Family Library feature gives you access to another Amazon user’s Kindle library. Amazon says it’ll let you access books from the account of a “spouse or partner” but we’re not sure how it’ll know who they are to you. The feature also allows two adults to manage up to four children’s accounts.

Kindle has a new update rolling out to its Kindle e-reader device hardware, which includes new features for the latest Kindle, Kindle Voyage and Kindle Paperwhite devices. The update includes the new Word Wise feature that automatically shows definitions to difficult words above the within text on compatible titles, as well as Family Library, which lets you access not only your own books, but also those of a spouse, partner or family member, and Kindle FreeTime Unlimited, a subscription service starting at $2.99 per month that provides curated access to special selections for kids and beginner readers.