diff --git a/book/book.tex b/book/book.tex
index 97bfb0f..3a16bcc 100644
--- a/book/book.tex
+++ b/book/book.tex
@@ -20,6 +20,9 @@
     allcolors=black
 }
 
+\usepackage{tikz}
+\usetikzlibrary{shapes,arrows}
+
 \graphicspath{
   {./images/}
   {./troubleshooting/}
@@ -36,6 +39,16 @@
 \advance\cftsecnumwidth 0.5em\relax
 \advance\cftsubsecindent 0.5em\relax
 \advance\cftsubsecnumwidth 0.5em\relax
+
+% Define block styles
+\tikzstyle{decision} = [diamond, draw, fill=blue!20, 
+    text width=4.5em, text badly centered, node distance=3cm, inner sep=0pt]
+\tikzstyle{block} = [rectangle, draw, fill=blue!20, 
+    text width=5em, text centered, rounded corners, minimum height=4em]
+\tikzstyle{line} = [draw, -latex']
+\tikzstyle{cloud} = [draw, ellipse,fill=red!20, node distance=3cm,
+    minimum height=2em]
+
 \begin{document}
 
 \begin{titlepage}
diff --git a/book/sourdough-starter/sourdough-starter.tex b/book/sourdough-starter/sourdough-starter.tex
index abd1048..77cfb85 100644
--- a/book/sourdough-starter/sourdough-starter.tex
+++ b/book/sourdough-starter/sourdough-starter.tex
@@ -131,7 +131,26 @@ use a glas and place another inverted one on top. The container shouldn't
 be airtight. You still want some gas exchange to be possible.
 
 \begin{figure}[!htb]
-  \includegraphics[width=\textwidth]{sourdough-starter-process.jpg}
+  \begin{tikzpicture}[node distance = 3cm, auto]
+   	\node [block] (init) {\footnotesize Mix 50g flour + 50g water, stir}; 
+	\node [block, right of=init, node distance=3cm] (wait1) {\footnotesize Wait 24 hours};
+	\path [line] (init) -- (wait1);
+	\node [block, right of=wait1, node distance=3cm] (feed) {\footnotesize 50g of previous day + 50g water + 50g flour, stir};
+	\path [line] (wait1) -- (feed);
+	\node [block, below of=feed] (discard) {\footnotesize Discard the rest};
+	\path [line] (feed) -- (discard);
+    \node [decision, right of=feed, node distance=3.5cm] (decide) {\footnotesize Is good?};
+    \node [decision, above of=decide, node distance=3cm] (timeout) {\footnotesize Less than 10 feeds?};
+	\node [block, above of=feed, node distance=3cm] (wait2) {\footnotesize Wait 24 hours};
+    \node [block, right of=timeout, node distance=3cm] (discard2) {\footnotesize Batch failed};
+	\path [line] (timeout) -- node{no} (discard2);
+	\path [line] (timeout) -- node{yes} (wait2);
+	\path [line] (feed) -- (decide);
+    \node [block, right of=decide, node distance=3cm] (use) {\footnotesize Ready to use};
+	\path [line] (decide) -- node{no} (timeout);
+	\path [line] (wait2) -- (feed);
+	\path [line] (decide) -- node{yes} (use);
+  \end{tikzpicture}
   \caption{The process of making a sourdough starter from scratch}
   \label{fig:sourdough-starter-process}
 \end{figure}