<human>:  Which books should I read to improve my English language skills?
<bot>: Some great books to improve your English language skills are: ' English Grammar in Use' by Raymond Murphy, 'Word Power Made Easy' by Norma Lewis, 'How to Speak and Write Correctly' by Joseph Devlin, 'The Elements of Style' by Strunk and White, and 'Grammar Girl's Quick and Dirty Tips for Better Writing' by Mignon Fogarty.