Additionally, by using used crates and wooden pallets, you may create your own window sill bookcase.Additionally, by using used crates and wooden pallets, you may create your own window sill bookcase.Additionally, by using used crates and wooden pallets, you may create your own window sill bookcase.Additionally, by using used crates and wooden pallets, you may create your own window sill bookcase.Additionally, by using used crates and wooden pallets, you may create your own window sill bookcase.