Durnan publishing’s motto

[rainous]

Durnan Publishing's motto can be summarized in three words: Easy, Simple and Practical, hence ESP.

Can anyone point out any grammatical mistake in above sentence?

Thank you

[5jj]

There are no grammatical mistakes as such, but it is not a partcularly good sentence.

I would say that Durnan's publishing motto is 'Easy, Simple, Practical'; its publishing philosophy can be summarised as 'Easy, Simple, Practical'.

Note that 'Easy, Simple and Practical' is made up of four words.