<Chapter id="sooner-faster-quicker">
-<Title>Advice on: sooner, faster, smaller, stingier
+<Title>Advice on: sooner, faster, smaller, thriftier
</Title>
<Para>
</Sect1>
-<Sect1 id="stingier">
-<Title>Stingier: producing a program that gobbles less heap space
+<Sect1 id="thriftier">
+<Title>Thriftier: producing a program that gobbles less heap space
</Title>
<Para>