Here is the ideal reference grammar for anyone studying Finnish. It provides a systematic account of the structures of the written language and also features the characteristics of colloquial Finnish as spoken in Helsinki and surrounding areas.
It assumes no prior knowledge of the language and clearly explains grammatical rules in a jargon-free manner.
Features include:

• pronunciation guide
• thorough discussions of word and sentence structure
• inflection tables
• subject index.
  
  

This grammar was first published in 1983, and continues to be a favorite with students as well as professional linguists.