This artbook from Canson uses a Coptic binding allowing the book to open completely flat to facilitate drawing over the two open pages.
Uses woodfree acid free 96gsm paper with a lightly textured surafce.
It's bound on the long side and has a magnetic closure
Available in three sizes
89 x 140mm
140 x 216mm
210 x 297mm (A4)
80 sheets per book