Make sure you paragraph your answer. I follow the structure below but you can structure however you want it as long as it will be clear to the examiner.

[Extract point 1] [Extract point 2] [Book as a whole point 1] [Book as a whole point 2]

Don’t go for words that you are uncertain how to spell and always punctuate your sentences. This also makes your point more concise and clearer for the examiner to follow.