A realistic industrial design prototype photo of an open mechanical puzzle book on a minimalist workshop table. Studio lighting, sharp focus. Side-profile perspective showing a heavy-duty, horizontal central axis metal rod. Rigid mechanical linkage arms connect to five separate 3D-printed plastic pages. Each page is a distinct 2-inch thick hollow block container. The book is captured in the opened flat position, perfectly balanced across the central axis. Clean lines, matte finish, visible precision engineering joints, architectural modeling style, photorealistic, 4k. See more