Improve Your English (The Essential Guide to English Grammar, Punctuation and Spelling) - J. E. Metcalfe, C. Astle

It's important in our daily lives for us to write clear English which is easily understood. If we get the basics wrong, our words may be misinterpreted and cause confusion. To make sure our written words convey our exact meanings, we need to understand the fundamentals of the English language, such as the parts of speech, how sentences and paragraphs are constructed, and the correct use of punctuation. We also need to spell the words correctly! This indispensable reference guide to the rules and conventions governing written English will help all those who are unsure about whether to use "its" or "it's", or a colon instead of a comma, or how to spell words such as "separate".