\documentclass[12pt,oneside]{book}
\usepackage{setspace}
\usepackage{emptypage}
\doublespacing
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{geometry} \geometry{top=1in, bottom=1in, right=1in, left=1.5in}% marigns setting for all the documents
\graphicspath{ {images/} }
\usepackage{tabularx}
\usepackage{caption}
\usepackage{subcaption}
\usepackage{titletoc}
\usepackage{biblatex}
\usepackage{atbegshi}
\addbibresource{ref.bib}
\pagestyle{plain}
\let\cleardoublepage=\clearpage
\usepackage{titlesec}
\titleformat{\chapter}[display]{\normalsize\centering}{Chapter \thechapter}{0pt}{}{}
\titleformat{\section}[display]{\normalfont\centering}{\thesection}{0pt}{}{}
\renewcommand{\bfseries}{\relax}
\begin{document}
\input{copyrightpage}
\makeatletter\@openrightfalse % avoid blank page before every new chapter
\newgeometry{top=1in, bottom=1in, right=1in, left=1in} % marigns setting for title page
\input{titlepage}
\restoregeometry
\AtBeginShipoutNext{\AtBeginShipoutDiscard}% Discard next blank page
\renewcommand{\thepage}{\roman{page}}{2}
\newpage
\addcontentsline{toc}{chapter}{Abstract}
\chapter*{Abstract}
\input{abstract}
\newpage
\addcontentsline{toc}{chapter}{Dedication}
\chapter*{Dedication}
To Jane and Joe
\newpage
\addcontentsline{toc}{chapter}{Declaration}
\chapter*{Declaration}
I declare that..
\newpage
\addcontentsline{toc}{chapter}{Acknowledgments}
\chapter*{Acknowledgments}
I want to thank...
\newpage
\tableofcontents
\newpage
\addcontentsline{toc}{chapter}{List of Figures}
\listoffigures
\newpage
\addcontentsline{toc}{chapter}{List of Tables}
\listoftables
\mainmatter
\chapter{Introduction}
\input{chapters/introduction}
\chapter{chapter one title}
\input{chapters/chapter02}
\chapter{chapter two title}
\input{chapters/chapter03}
\chapter{chapter three title}
\input{chapters/chapter04}
\chapter{Conclusion}
\input{chapters/conclusion}
\appendix
\chapter{Appendix}
\input{chapters/appendix}
\printbibliography
\newpage
\addcontentsline{toc}{chapter}{Curriculum Vitae}
\input{CV}
\end{document}
