freeCodeCamp/curriculum/challenges/english/11-machine-learning-with-python/machine-learning-with-python-projects/book-recommendation-engine-using-knn.english.md

---
id: 5e46f8e3ac417301a38fb92f
title: Book Recommendation Engine using KNN
challengeType: 10
isHidden: true
isRequired: true
---

## Description
<section id='description'>
In this challenge, you will create a book recommendation algorithm using K-Nearest Neighbors.

You will use the Book-Crossings dataset. This dataset contains 1.1 million ratings (scale of 1-10) of 270,000 books by 90,000 users.

You can access <a href='https://colab.research.google.com/drive/1TDgXyXqZwsiGlnuF-bmQ2Rh3x5NcrHEn' target='_blank'>the full project instructions and starter code on Google Colaboratory</a>.

After going to that link, create a copy of the notebook either in your own account or locally. Once you complete the project and it passes the test (included at that link), submit your project link below. If you are submitting a Google Colaboratory link, make sure to turn on link sharing for "anyone with the link."

We are still developing the interactive instructional content for the machine learning curriculum. For now, check out these learning resources on the freeCodeCamp.org YouTube channel:
<ul>
  <li>
    <a href='https://www.freecodecamp.org/news/learn-to-develop-neural-networks-using-tensorflow-2-0-in-this-beginners-course/'>TensorFlow 2.0 Course</a> (2 hours)
  </li>
  <li>
    <a href='https://www.youtube.com/playlist?list=PLWKjhJtqVAblStefaz_YOVpDWqcRScc2s'>Machine learning playlist</a>
  </li>
<ul>

</section>

## Instructions
<section id='instructions'>

</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: 'It should pass all Python tests.'
    testString: ''

```

</section>

## Challenge Seed
<section id='challengeSeed'>

</section>

## Solution
<section id='solution'>

```py
  # Python challenges don't need solutions,
  # because they would need to be tested against a full working project.
  # Please check our contributing guidelines to learn more.
```

</section>