Number 4

A stack of four books of different sizes.

Stack Of Books

Stack Of Four Books

A shelf with four rectangular storage compartments containing books and decorative items.

Accent Shelf With Decorations

Stacks Of Books

Stack Of Books 

Book Spine

Books

A row of four vertical books, three straight and one tilted, seen from the side.

Row Of Four Books 

Stacked Books

Row Of Books

Open Book

Book

Clover

A pile of four books stacking on each other.

Book Pile

Pile Of Four Books

Bookshelf 

Spark shape 

A tall bookshelf with four shelves and many rows of books.

Rectangular Bookshelf With Books

Bookshelf

Book Stnad

Three tall bookshelves with four shelves and many rows of books.

Bookshelves With Books

Four books forming a stack, or overlapped rectangular shapes.

A calendar with four rows of four rectangles, all with a dot in the corner.

Calendar

Bread Loaves

Book On A Stand

Grass Stalks

Lines

Baguettes

An open book with four parallel lines of text on each page, facing front.

Open Book Facing Front

Four stacked books or plain rectangles next to a vertical book or rectangle.

Stack Of Books Or Rectangles

A large book, a small book and a cup of pens.

Books And Pens

Closed Book

A stack of four books with an Erlenmeyer flask on top.

Stack Of Books With Erlenmeyer Flask

Drone With Four Propellers

Four Color Rainbow

Four different-sized stacked books with curved spines.

A busy and overworked manager or employee surrounded by charts, graphs, and notifications.

Illustrations of four books