I don't agree with the above - its rather too late by then if they say "well its take it or leave it".
One's contract of employment usually consists of several elements - the main parts are the offer letter and the Company Handbook. Any decent company shouldn't have a problem letting him have a Handbook with the offer letter. Usually one signs the offer letter to accept the job.
As a minimum, the offer letter should explain, the salary, the hours of work, the holidays, the pension arrangements, anything about bonuses, how appraisal / performance review is done, some of this list by referencing the Handbook.