You dont need to maintain books of accounts to file ITR of House Property.
All You need is details of
Total amount of Rent which you have received,
details of house tax/property tax which you have paid
Any interest on housing loan paid
during the year.
You need to file ITR 2 (if not doing business)
or ITR 4(If doing business also)
For details on how to compute Income from House Property,you can refer