# What is the Book Add-On?

> The Book Add-On is an optional upgrade that includes a specially curated book shipped alongside your monthly crate to complement that month's theme.

Source: https://support.kiwico.com/en_us/what-is-a-deluxe-subscription-BJX6sDeMw

Last updated: 2026-05-19T18:20:24.433Z

The Book Add-On is an optional upgrade that includes a specially curated book shipped alongside your monthly crate to complement the theme. Each book arrives in addition to your regular crate contents, giving your child even more to explore and enjoy.

## **How Books Are Selected**

Each book is hand-picked by our editorial team, who review hundreds of titles each year. They carefully evaluate every selection to ensure it is:

*   ****Interesting and enriching**** — designed to spark curiosity and a love of learning
*   ****Age-appropriate**** — whether your child is a toddler or a teen, the book is matched to their developmental stage
*   ****A great addition to your home library**** — something you'll be excited to keep on the shelf

## **Subscription Eligibility**

The Book Add-On is available for all KiwiCo subscriptions ****except**** the following:

*   Eureka Crate
*   Maker Crate

  

![image-1__1_.jpeg](https://cdn.kustomerhostedcontent.com/media/5f15a77271f7dc001af711c3/b746309a4b66e708b15e112680ce2645.jpeg)

## **How to Add the Book Add-On**

****New members:**** During checkout, after selecting your subscription type and payment option, click the ****"Yes, add the book!"**** button to include the Book Add-On with your first crate.

****Existing members:**** Already placed your order? No problem! Click [here](https://kiwico.kustomer.help/en_us/how-do-i-change-my-subscription-to-deluxe-rkOIivgGw) to learn how to upgrade your existing subscription to include the Book Add-On. If you're unable to upgrade using that method, please reach out to our customer care team for further assistance.