Oh sayeth, I love this idea! Thank you for starting this thread.
First I'd check out Lewis Carrol's "Through the Attic Door, Alice's return to Wonderland"
Then I'd borrow that book Borges' wrote about, but whose author remains a mystery "The Book of Sand".
That might keep me busy for a while. Let's hope there's no overdue fines at the Interdimensional Library.
For lighter fare, I'd also check out the BONE-like ubertome (1300 pages!) of Jeff Nicholson's "Colonia". Sadly, in this world, we only have about three hundred pages so far. Draw faster, Nicholson!
I'd track down and borrow that book of collaborative short stories between Poe and Bradbury "Blacker than night, lighter than air". Swirls of optimism and pessimism, terror and delight in equal measure, outer space and closed tombs, bright-lit circuses and dark ruinous houses, all re-shuffled and re-dealt like an everwhirling kaleidoscope.
I'd then get the Gene Wolfe annotated and explicated version of his story "Seven American Nights".
Man, I could seriously go on here, so I'd better stop.