The old film camera
PencilChallenging

Draw a closed book as a shallow box, then soften the corners. A ribbon bookmark and a few page edges add a manageable amount of detail.
Sketch the top cover as a slanted rectangle, then lower its front corners to give the book thickness. Keep matching edges aligned.
Add the spine curve and a small cover overhang. Place just a few parallel page lines inside the visible page block.
Draw a narrow bookmark emerging from the pages. Shade below the overhanging cover and add a light ground shadow.
A small thing to tryCompare the angles of opposite cover edges. A consistent shallow box is more convincing than dozens of individual page lines.