If we arrange all possible combinations of letters into strings, then we can have all the books which burned in Alexandria. But if you had to walk along an isle

If we arrange all possible combinations of letters into strings, then we can have all the books which burned in Alexandria. But if you had to walk along an isle in the library of the superset of all possible books, you would die before you came across one that existed. And if you could live forever, there would be uncountable minor varations variations of imposter books before the actual one.