Book bag

FIG. 1 is a front perspective view of a book bag;

FIG. 2 is a front elevational view of the book bag;

FIG. 3 is a left side elevational view of the book bag;

FIG. 4 is a right side elevational view of the book bag;

FIG. 5 is a top plan view of the book bag without a strap shown;

FIG. 6 is a back elevation view of the book bag;

FIG. 7 is a lower plan view (bottom) of the book bag shown without the strap;

FIG. 8 is a front elevation view of the book bag in a first open state without the strap shown;

FIG. 9 is a front perspective view of the book bag in the second open state without the strap shown;

FIG. 10 is a front perspective view of the book bag in the second open state with removable pockets attached thereto; and,

FIG. 11 is a front perspective view of the book back in the second open state with the removable pockets removed therefrom.

The broken lines showing the details of the circular latch in FIGS. 1, 2, 3, 4, 5, 7, 8 and the removable pocket in FIGS. 10, 11 are for illustrative purposes only and form no part of the claimed design.