Looks ok to me

. When we last moved we had good old tea chests for our books, 18 of them in the end

. Then it took us months to get rid of/palm off the blooming tea chests.
At least you'll be able to fold the boxes up flat.
Just one thing though - you always need far more boxes than you'll ever imagine. Once you start opening the cupboards and draws and trying to pack it all, let alone the books......you have my deepest sympathy
