English Basics

Hello, first time user here hoping his question is relevant!

I have been offered a job recently involving the use of clear/accurate english, hard copy, easily constructed sentences etc and even though my grasp of the english language is basically sound and i can string a coherent sentence together i feel i need to brush up on some of the basics i didn't have instilled in me fully whilst at school.

The points i am referring to are things like: pronouns, adverbs, nouns, conjugating, split infinitives, plural. Words i often read about or hear about but could not fully explain or admit to knowing the full meaning of. The reason i am asking this question is because i am searching for a book maybe that covers these areas and other basic useages of English to help me brush up and finally cut off these chains, for want of a decent metaphor!

Thanks in advance for any suggestions. Regards - Steve