typo

book.tex

@@ -8174,7 +8174,7 @@ particularly illuminating because it deals with the challenges we
 discussed above regarding nested \key{if} expressions
 (Figure~\ref{fig:explicate-control-s1-38}).  The
 \racket{\lstinline{thn^}}\python{\code{body}} and
-\racket{\lstinline{els^}}\python{\code{orlese}} branches of the
+\racket{\lstinline{els^}}\python{\code{orelse}} branches of the
 \key{if} inherit their context from the current one, that is,
 predicate context. So you should recursively apply
 \code{explicate\_pred} to the