I often re-read books. Some books I have read more than a dozen times, usually finding something new in them, as well as re-affirming or re-experiencing at least some of my earlier reads.
Some books I have read ten times or more, over the last thirty years or so, and I hope and expect I will continue to re-read them every three or four years into the future.
These books include some that might be considered obvious for a fantasy writer such as myself, like The Lord of the Rings, or The Moon of Gomrath. But I spread my re-reading widely, and some of the books I have revisited in the last year or so include:Goodbye to All That, Strangers and Brothers 1, The World Of Psmith: The Psmith Omnibus, Double Eagle and Crescent: Vienna's Second Turkish Siege and Its Historical Setting, The Demon Princes, Black Hearts in Battersea, The Black Riders, and pretty much the entire oeuvre of thriller writers Desmond Bagley and Hammond Innes. In fact with the latter I re-read The Wreck Of The 'Mary Deare' only a month or so ago, and then saw the film completely by chance a few weeks later.
That is pretty much a random sampling of the recent re-reads, just from looking at what has migrated from the piles next to my bed to the nearest bookshelf. I see a couple of Heinleins too, notably Starman Jones and Citizen of the Galaxy. Which by a process of childhood association, makes me think I am overdue to re-read some Andre Norton, specifically Star Man's Son, 2250 A.D and perhaps Sargasso Of Space . . .
Though perhaps I should read some of the new books next to my bed first!