Atlas Obscura tells us about the building of a 16th century machine for reading multiple books at the same time.

Do not be beguiled by the illustration on the left into mounting a search through ancient libraries in hopes of finding such an object. The illustration comes from a book by Agostino Ramelli (1532- c.1610), Le diverse et artificiose machine. The book contains lots of designs, mainly focussed on hydraulic engineering, but the bookwheel is probably the best known illustration. The machine was, as far as we know, never actually constructed before Rochester Institute of Technology students built two of them in 2018. You can interact with one of their machines at the Melbert B. Cary Jr. Graphic Arts Collection at RIT’s Wallace Library, and with the other at the University of Rochester’s Rossell Hope Robbins Library. Other, simpler, bookwheels do however exist: a number may be seen at Erik Kwakkel’s blog post Medieval Book Carousels.

Seems to me the most efficient use of such a rotating book holder would be to have an assistant at the back and multiple copies of the same book in each location (there are eight) — the assistant would turn four leaves every time a copy of the book passed by so that the reader could speed though and maybe even take the occasional note while ripping through the text.