@yUYOhana There's no official English release, but if you want to pick up the Japanese tankobon, then throwing 針棘クレミーと王の家 into Google will give you results for sites like CDJapan and Amazon.co.jp.
This might be one of the few times I've witnessed a manga that ends gracefully and doesn't just slam the brakes at the last chapter - everyone's happy - goodbye. Good read, very wholesome.