Books is correct.
The plural way to spell studio is studios.
The plural is cantaloupes.
The plural is roses.
The plural is "emeralds."
The word is spelled children, just as you spelled it. It is the plural of "child".
Books is already the plural of book.
That is the correct spelling of the plural noun "booklets" (books, pamphlets).
The plural of book is books. As in "these are good books".
The plural way to spell studio is studios.
The plural is resources.
The plural is cantaloupes.
The plural is hooves.
The plural is cherries.
The plural is roses.
The plural is "emeralds."
The word is spelled children, just as you spelled it. It is the plural of "child".
The plural is bridges.