\documentclass[10pt,titlepage]{book}
\usepackage{xltxtra}
\usepackage{polyglossia}
\setmainfont{Charis SIL}
\newfontfamily\sanskritfont[Script=Devanagari,Mapping=RomDev]{Sahadeva}
\newcommand{\skt}[1]{{\begin{sanskrit} #1\end{sanskrit}}}
\newfontfamily\hindifont[Script=Devanagari]{Lohit-Hindi}
\newcommand{\hin}[1]{{\begin{hindi} #1\end{hindi}}}
\newfontfamily\bengalifont[Script=Bengali]{Lohit-Bengali}%Arial Unicode MS, Free Serif, Vrinda and Code2000 also possible
\newcommand{\ben}[1]{{\bengalifont{#1}}}
\setdefaultlanguage{english}
\setotherlanguage{sanskrit}
\setotherlanguage{hindi}
%\renewcommand{\baselinestretch}{1.2}
%\setmainfont[]{Gentium Basic}
%\setromanfont{Gentium Basic}
%\setdefaultlanguage{english}
%\setotherlanguage{sanskrit}
%\newfontfamily\sanskritfont[Script=Devanagari,Mapping=velthuis-sanskrit]{Arial Unicode MS}
%\newcommand\dn{\catcode `\~=12 
%		\fontspec [Script=Devanagari,Mapping=velthuis-sanskrit]{Arial Unicode MS}}
%\newcommand{\dev}[1]{{\begin{sanskrit} #1\end{sanskrit}}}
%\catcode `\~=12 
%\newfontfamily{\dn}[Script=Devanagari,Mapping=velthuis-sanskrit]{Nakula}
%\usepackage{devanagari}
%\usepackage{palatino}
%\usepackage[larger, iitalic, uitalic]{skt}
%\usepackage{times}
%\font\hugeskt=skt10 at 15mm
%\font\largeskt=skt10 at 10mm
%\font\midskt=skt10 at 5mm
%\font\midsktb=sktb10 at 5mm

\newcommand{\version}{0.1}
\newcommand{\moddate}{\today}
\setcounter{secnumdepth}{3}
\setcounter{tocdepth}{3}
%\setlength{\parskip}{1.5ex  plus 0.5ex minus 0.5ex}
%\parindent 0mm%   remove paragraph indenting

%Settings for 5.5 x 8.5
\setlength{\topmargin}{0.75in}
\setlength{\oddsidemargin}{1.125in}
\setlength{\evensidemargin}{1in}
\setlength{\headheight}{0.25in}
\setlength{\headsep}{0.25in}
\setlength{\textheight}{6.75in}
\setlength{\textwidth}{4.375in}
\setlength{\footskip}{0.375in}
