“absolutely real-have pages and everything. i thought they’d be nice durable cardboard. matter of fact, they’re absolutely real. pages and-here! lemme show you.” meaning

This was one of the quotes in the Great Gatsby which was said by:

A quote is a repeat or copy of words from a text or speech written and spoken by another person.

In his description of Gatsby's book, he likened it to having something real and honestly being real which means that Owl eye was appreciating how real Gatsby presents his books.

Please note that this question is incomplete, so i gave you a general view on this to guide you.

Read more about the Great Gatsby here:

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a source card is mage during research to tell the facts about the source one is using.

an expression designed to call something to mind without mentioning it explicitly; an indirect or passing reference.