Book stack backpack

Description

FIG. 1 is a front view of a book stack backpack;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a left-side view thereof;

FIG. 7 is a perspective view thereof, showing flaps down; and,

FIG. 8 is a perspective view thereof, showing flaps up.

Claims

The ornamental design for a book stack backpack as shown and described.