How do I even open this pdf of book

To open a PDF book, you'll need a PDF reader installed on your device. If you're using a computer, you can use Adobe Acrobat Reader, which is a free download from the Adobe website.

Alternatively, you can also use other PDF readers like Foxit Reader or SumatraPDF. If you're using a mobile device, you can download a PDF reader app from the App Store or Google Play Store.

Some popular options include Adobe Acrobat Reader, PDF Reader, and Google PDF Viewer. Once you have a PDF reader installed, simply locate the PDF file on your device and open it with the reader. You can also right-click on the file and select "Open with" to choose your preferred PDF reader.