Although there have been notable instances of very large photography books being printed, there doesn’t seem to be a way to search books by their size.
In other words are there printing presses that handle art books beyond folio size?
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Books can be any size.
Web presses can often handle widths of 35", even extending to as much as 56".
Often it's the bindery machines with limited size support, but if one wishes to hand-bind, the only limitation then become press size capabilities.
Form vs Function
One would probably question what use a "book" is with 35" wide pages. It would not be an easy task to turn pages, much less keep pages from getting wrinkled, creased or torn.
According to the 2007 Guinness World Records, the largest published book in the world was The Little Prince printed in Brazil in 2007. Its size is 2 m × 3.1 m (6.6 ft × 10.2 ft).