Jonah, where should you find it in library?

In fiction, or history?

This is a very familiar story. Some people say its an allegory or parable. But parables are usually basic. The story itself has historical and geographical elements. Whoever wrote it seemed to want us to believe that this was a real event. It assumes historical correctness. Jesus likens himself to Jonah and spoke of the people of Ninevah as real people who really repented. Jesus took it seriously, so if we want to follow him so should we. (Adrian Warnock's summary of a Liam Gallagher sermon at New World Alive-- UK stuff)

from ESV study bible:
The book of Jonah has all the marks of a prophetic narrative, like those about Elijah and Elisha found in
1 Kings, which set out to report actual historical events.The phrase that opens the book (“the word of the
Lordcame to”) is also at the beginning of the first two stories told about Elijah (1Kings 17:2,8) and is used
in other prophetic narratives as well (e.g.,1 Sam.15:10; 2 Sam.7:4).Just as the Elijah and Elisha narratives
contain extraordinary events,like ravens providing bread and meat for the prophet (1 Kings 17:6),so does
the book of Jonah,as when the fish “provides transportation”for the prophet.In fact,the story of Jonah is
so much like the stories about Elijah and Elisha that one would hardly think it odd if the story of Jonah
were embedded in 2 Kings right after Jonah’s prophetic words about the expansion of the kingdom. The
story of Jonah is thus presented as historical, like the other prophetic narratives.
There are additional arguments for the historical nature of the book of Jonah. It is difficult to say that
the story teaches God’s sovereignty over the creation if God did not in fact “appoint” the fish (1:17), the
plant (4:6),the worm (4:7),and the east wind (4:8) to do his will.Jesus,moreover,treated the story as histori-
cal when he used elements of the story as analogies for other historical events (see Matt.12:40–41).This is
especially clear when Jesus declared that “the men of Nineveh will rise up at the judgment with this genera-
tion and condemn it, for they repented at the preaching of Jonah”(Matt.12:41).