... puzzle book1.coloring puzzles books,photo books 2.inner:art paper,4+4C printing,white cardboard 1. 15.9x15.9cm2. 350gsm ... material: coated art paper,book paper,offset paper,wood-free,foam,leather cover,etc.3)Paper types: c1s/c2s gloss art paper,ect.4)Binding method ... :(perfect binding): saddle stitch,section sewn,hard bound,wire bind,glue bind,etc.5) Surface finish: gloss ...