Hover your cursor over the button in the upper, left-hand corner and pick the option “From scratch” – you will land on the “Create page”. Type in the title of your photo book and click “Create your PastBook”. Then click the “Upload your pictures” button and select One Drive.
All of your folders on One Drive will show, just click on one to select the photos stored there. After making your selection, click on Upload to create the book!