Crawler written in Yii2 to grab the data from other websites

General information for the website: I would like to grab information about ebooks for free downloading
Kind of development: New website from scratch
Description of requirements/features: The website has to have a search field which takes ISBN. After put ISBN to the field and click search button it should return the list of links with ebooks to download.

The ebooks' database to compare with given ISBN should be built based on a list of websites I will give you. Then you should go through the websites and check if given ISBN exists in, if yes - make a new record containing:

- URL to download
- ISBN
- Title of the book
- Description if available
- information about current accessability the ebook (checked repeatedly via cron)
Extra notes: