\documentclass[10pt,a4paper,titlepage]{book}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{moreverb}
\usepackage{listings}
\author{Brett Langdon}
\title{Programming In General}
\lstset{language=php,numbers=left,stepnumber=1}
\begin{document}
\maketitle
\tableofcontents

\chapter{Introduction}
\input{"./1 - Introduction/Introduction"}

\chapter{Functional Programming}
\input{"./2 - Functional Programming/Functional Programming"}

\chapter{Object Oriented Programming}
\input{"./3 - Object Oriented Programming/Object Oriented Programming"}

\chapter{Data Structures}
\input{"./4 - Data Structures/Data Structures"}

\chapter{Algorithms}
\input{"./5 - Algorithms/Algorithms"}
\end{document}