A pair of Belgian Malinois.

So you can add books to his weapons arsenal.

Note:

John Wick asked for the book “Russian Folk Tales” by Alexander Afanasyev, 1864.
But there is no edition of that book published in that year.

@wonder2wonder said:

So you can add books to his weapons arsenal.

Oh, that book scene..the way he broke his jaw...ouchy poo!