A book on improving eloquence, proficiency and grammar in everyday communication. 'How to Speak and Write Correctly' is not a manual of the styles to use in speaking and writing, nor is it a manual for grammar. It is a simple, useful book for helping ordinary people in effective communication. It lays down and explains broad rules of communication, further giving useful tips for effective communication. The book also lists common mistakes in communication and offers suggestions on how best to avoid them. Joseph Devlin, also known as Joe Devlin, (13 February 1871 - 18 January 1934) was an Irish journalist and influential nationalist politician. He was a member of parliament (MP) for the Irish Parliamentary Party in the House of Commons of the United Kingdom of Great Britain and Ireland, and later a Nationalist Party MP in the Parliament of Northern Ireland.