I  make the two fields inactive in the Book master table by usiong "active" field.

Python code is -

class book_master(osv.osv):

 _name =""
    _order = "name asc"
    _columns = {
        'book_no' : fields.char('Book  ID', size=30, readonly=True),
        'name'             : fields.char('Procedure Type', size=60),
        'active': fields.boolean('Active', help="If unchecked, it will allow you to hide the Facility without removing it."),
                }
    _defaults = {
         'active': 1,       
       }

Xml code is

 <record id="view_book_master_form" model="ir.ui.view">
        <field name="name">book.master.form</field>
        <field name="model">book.master</field>
        <field name="type">form</field>
        <field name="arch" type="xml">
         <form string="Book  Details">
          <field name="book_no"/>
          <field name="name"/>
          <field name="active"/>
         </form>
       </field>
       </record>

I don't want to lose historical data associated with these books, just need them to not be visible in our book list.

Please help me

Thanks