"It has generated a lot of discussion in the community, so I think it will continue to be popular over the coming months," she said.
Ms Gilbert said the library would buy a second copy if enough people put the book on hold.
She said she thought the ban on the novel was "a bit over the top".
"It drew a lot of attention to the book so I think it's only raised its interest in the community," she said.
McLeods Booksellers Rotorua owner Lynne Jones said the controversy had not increased their customers' interest in the book.
"We haven't noticed an increase in sales of Into the River, but we will see what the next few weeks brings. I haven't read it personally but a colleague that has read it says she didn't find it to be inappropriate at all," she said.
According to the Film and Literature Board of Review's most recent decision on Into the River, the board received more than 550 submissions and emails expressing views about the book. The board said it accepted there were aspects of the book which many would find offensive and regard as inappropriate for children.
However, none of the submissions provided any direct evidence of any harm caused when the book was available on an unrestricted basis.