Mark Lester 
McGraw-Hill’s Essential ESL Grammar [PDF ebook] 
A Hnadbook for Intermediate and Advanced ESL Students

Master American English and communicate with confidence As an experienced student of English, you know the language can be a tricky one to learn with its complex grammar and its many "exceptions to the rule" rules.Written by ESL guru Mark Lester–author of Grammar and Usage in the Classroom–this authoritative reference unravels these mysteries so you can take your English-language skills to the next level. You’ll gain the confidence to speak English in any setting: in the workplace, at school, in social situations, and at home.Master those troublesome subjects that baffle even native speakers of English:articles * determiners * predicate adjective complements * post-noun modifiers * conjunctions * word order * verb tenses * modals * noun clauses