On the Clip Art and Media site on Microsoft Office Online, you can search for black-and-white clip art easily.

First, find the Browse Clip Art and Media Categories section on the Clip Art and Media home page.

Then, click Black & White. The term Black & White appears in the Search box near the top of the screen.

You can narrow your search within the black-and-white category. In the Search box, type what you are looking for and then click the Search button. In this example, let's use books.

You are now presented with all the black-and-white clips of books, and you can select the art you want to use.

Additionally, you can narrow your search within categories beyond black-and-white clips. Choose any of the categories in the Browse Clip Art and Media Categories section and narrow your search until you find the clip art you want.