Does My Cloud work with My Book drives?

Hi
I have just received the 8Tb My book drive (Product No.: WDBBGB------) and see that the WD Discovery software shows a link to “My Cloud Home” but when I try to set up this feature I am asked to “enter a device code” that does not appear on the drive.

Is this software feature only for other types of drive?
And if so, why is this feature bundled with the drive?!

Thanks In advance.

My cloud and my book are two different product.