Last vs. LatterHow to use "last" and "latter" correctly
Although latter is sometimes used to refer to the last of three or more things, it should technically only be used to refer to the second of two things. (Remember that its usage follows the pattern of comparative adjectives like better and quicker, which are used when comparing only two things.)
Batman, Superman, and Aquaman all have terrible taste in music, but the latter has the worst taste.
Batman, Superman, and Aquaman all have terrible taste in music, but the last has the worst taste.
Superman and Aquaman both have terrible taste in music, but the latter‘s taste is worse.
Common Errors in English Usage: Errors in diction and idiom commonly made by native speakers of English
List of Common Errors in English Usage (PDF): Printable version of the complete list
Common Grammar Errors: A list of common errors in grammar (topics like subject-verb agreement and parallelism) as distinct from usage