I advice you to obtain the fresh information about Sri Lanka and it must be sufficient for reliance. When you arrived at Sri Lanka, usualy Colombo international airport , please visit the counter of CTB (Ceylon Tourist Board) near Banks alley at the Air port.Here, you can get some Sri Lanka gouid books and road maps.Of course, those are no charge.
There are another gouid books published by private office ,those are 'Sri Lanka Exploer' and 'This month in Sri Lanka' or some other booklets.(some are in the charge).

accommodation guid (CTB)(right booklet)