romaaninsa
Romaaninsa is a Finnish possessive construction formed from the noun romaani (novel) plus the third-person possessive suffix -nsa / -nsä, yielding the phrase that means “his/her/its novel” or, more contextually, “the novel of him/her/it.” In Finnish, possessive suffixes attach directly to the noun and indicate the possessor, not the number of the possessed item.
The standard written form is romaaninsa, which shows the third-person possessive in a singular possessor context.
Usage notes: Romaaninsa is used when referring to a single novel owned or associated with a third-person