How to read ebook in SharePoint 2019

[Avian 1]

Hello, we are using SharePoint 2019. We have some ebook url's from different providers. We want to allow user to read this book in SharePoint. We tried in Page Viewer as well in content editor using iframe. but ebook is not opening in these webparts. However when we use these directly in browser, we are able to see these ebook.

Is there any ebook viewer available for SharePoint or any other way to see the ebook?

Thanks

Avian

[#2]

The only out of the box viewer available in SPO is the Kindle WebPart: https://support.microsoft.com/en-us/office/use-the-kindle-instant-preview-web-part-efc126dd-1916-432...

[#3]

Hello Juan, I already tried this as well.  Unfortunately some of ebook url not hosted with SSL, so I am getting following error. 

We only support embedding content from secure websites (their addresses start with https.) If it's important to embed content from unsecured websites, please send us feedback.

I also tried https ebook url, I am getting following error

This is not a valid Kindle instant preview link. Find your Kindle book, and then click Embed to get a valid link.

Any other suggestion

Thanks

Avian

[#4]

I'm also getting this error

"This is not a valid Kindle instant preview link. Find your Kindle book, and then click Embed to get a valid link."

even though I have gone into site admin > html security and added it as a domain to allow this iframe.

The address does contain https:

Any solution for this? 

@Juan Carlos González Martín