Colección de 'novela' vs 'novelas'

[fglorca]

La editorial va a sacar una nueva colección de novela.
La editorial va a sacar una nueva colección de novelas.

I think the first one is grammatically incorrect, but I have seen expressions like this one several times. I must assume the 'collection' contains more than one.

Any help would be appreciated.

[AngelicaDeAlquezar]

The first one may refer to the genre and the other to the number of novels to be issued, but yes, "colección de novelas" sounds much better. ;)