Why is the ending EN in “irgendeinen” used in "Hast du irgendeinen dieser Romane gelesen?

Question

I'm trying to figure out the grammatical rule in using the ending EN in "irgendeinen" in the sentence:

Hast du irgendeinen dieser Romane gelesen?

Since "the novels" is plural in die Romane, and it's using the genitive in asking whether or not you've read any of these books, I thought the "any" would have been accusative?

The ending with en is usually seen in either dative plural or masculine accusative, both of which don't seem to fit in the above construction.

I thought the any would then have been irgendeine dieser Romane?

Answer 1

It is accusative singular masculine. "Irgendeinen" is a compund of "irgend-einen" ("any one").

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Edit:

The translation of the sentence may help understanding:

Have you read any (one) of these novels?

"Dieser Romane" is genitive plural because it is genitive partitive: the whole (these novels) of which a part (any one) is referred to.

Answer 2

You could also say:

Hast du irgendeinen (Roman) dieser Romane gelesen?

but it sounds weird, because of two times the same word. So you can skip out the first "Roman" and the meaning stays still the same.

So its a accusative with a genitive, called genitive partitive, like in the other answer mentioned. This genitive also works with dative.

Ich schenke dem Bruder meines Vaters ein Buch