Question about “para”

So an infinitive, such as leer, means to ____, in this case to read. So the sentence “Quiero leer el libro” should mean “I want to read the book.” Some sentences I’ve come across sometimes have “para” in them, such as “Quiero algo para leer en el tren.” What is the point of “para” in that sentence? Wouldn’t it still make sense without it?

submitted by /u/-Tractorman-
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