# Modify ebook

{% hint style="warning" %}
The documentation is designed for Liker Land and LikeCoin v2. For information on [3ook.com](https://3ook.com/) and LikeCoin v3, please visit [docs.3ook.com](https://docs.3ook.com) and [dao.like.co](https://dao.like.co/).
{% endhint %}

If there are any errors in the ISCN content, epub, or pdf file content of ebooks, they can be modified in the following ways:

**Step 1**: Go to "[My Works](https://app.like.co/works)" at app.like.co and find the ISCN of the corresponding book.

<figure><img src="/files/o8Z9L2f2ZF8P8nepGJ1q" alt=""><figcaption><p>Go to "My Works" at app.like.co</p></figcaption></figure>

**Step 2**: After locating the ISCN, click on "**Edit ISCN**".

<figure><img src="/files/Vxg5J26gnViHhZUKxAXU" alt=""><figcaption><p>After locating the ISCN, click on "Edit ISCN"</p></figcaption></figure>

**Step 3**: The "Edit ISCN Info" appears. If you need to modify the ISCN Title and Description, click "Update ISCN" after the information has been modified. If you need to replace the epub or pdf file, click on "Content Fingerprints", and "**Re-upload files to update links**" will appear for re-uploading the updated epub or pdf file.

<figure><img src="/files/wmiEkQGl0vVAAxxsqdIn" alt=""><figcaption><p>Edit ISCN Info</p></figcaption></figure>

**Step 4**: Taking the picture below as an example, this ISCN has changed from providing only a horizontal version epub to providing both horizontal and vertical version epubs. Therefore, after re-uploading both vertical and horizontal version epub files, click the "Trash" button to delete the duplicate cover file and then click "**Start Upload**". The Keplr wallet will pop up a window several times. Click "Approve".

<figure><img src="/files/FjwsHwk93YKSElOsTIiR" alt=""><figcaption><p> Click "Start Upload" to re-upload the updated files</p></figcaption></figure>

**Step 5**: After completing the upload, click "**Update ISCN**" and confirm the update.

<figure><img src="/files/XWseYs4RAn36cbz9oI3T" alt=""><figcaption><p>Click "Update ISCN"</p></figcaption></figure>

**Step 6**: After the ISCN is updated, the version number is displayed as /2, representing the second version of the ISCN. At the same time, readers who have purchased the ebook can re-download the new version.

<figure><img src="/files/2MDYidlbYqVmxbMgkbmW" alt=""><figcaption><p>ISCN is updated</p></figcaption></figure>

{% hint style="info" %}
Users can [Clear Reader Cache](/depub/liker-land.md#clear-reader-cache) to see the new content.
{% endhint %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.v2.like.co/depub/book-store/modify.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.