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Assuming they are all right side up and spine out, there would be 40,320 different ways of arranging them.

Consider: There are 8 choices for the 1st book, 7 for the 2nd, 6 for the 3rd, 5 for the 4th, 4 for the 5th, 3 for the 6th, 2 for the 7th and 1 for the 8th. Multiplying these numbers out:

8 x 7 x 6 x 5 x 4 x 3 x 2 x 1 = 40,320. More than you thought?

The mathematical name for this is called finding the factorial of a number!

It is written n! ( n followed by an explanation point) -

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Q: How many ways can 8 books be arranged on a bookshelf?
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