Book Holder with Integrated Page Holder

Version 2 Added!
I've increased the infill to 10% Gyroid and added a 2nd plate with pre-sized page holders to allow for Bambu Handy support.
You can now print plate 1 with the page holder deselected and then print plate 2 with the desired size selected all from the Handy App.

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Here is a book holder I created with an integrated page holder. With this design you can pick up or place down your book and page holder in one move with one hand.

I've included a negative cylinder, select it and scale the X or Y size to the diameter you want for your thumb(make sure the uniform scale is checked).

EDIT: Also, please consider increasing the infill to 10-15% for a stronger print.