Date range in Rails -

i´m looking find "books" between specific dates.

i have variable publishdate , want books have publish date between dates, i´m not sure operator use.

i tought of it´s not working

@books = book.where(:e_release_date => 20141217 && :e_release_date <= 20141017) 

i'm assuming using activerecord. in activerecord can query between this:

@books = book.where(:e_release_date => 20141217..20141017)