diff --git a/book/a_stochastic/random_search.tex b/book/a_stochastic/random_search.tex
index 48f4cf70..ce706c69 100644
--- a/book/a_stochastic/random_search.tex
+++ b/book/a_stochastic/random_search.tex
@@ -107,7 +107,7 @@ \subsection{References}
 \subsubsection{Primary Sources}
 There is no seminal specification of the Random Search algorithm, rather there are discussions of the general approach and related random search methods from the 1950s through to the 1970s. This was around the time that pattern and direct search methods were actively researched.
 % seminal
-Brooks is credited with the so-called `pure random search' \cite{Brooks1958}. Two seminal reviews of `random search methods' of the time include: Karnopp \cite{Karnopp1963} and prhaps Kul'chitskii \cite{Kulchitskii1976}.
+Brooks is credited with the so-called `pure random search' \cite{Brooks1958}. Two seminal reviews of `random search methods' of the time include: Karnopp \cite{Karnopp1963} and perhaps Kul'chitskii \cite{Kulchitskii1976}.
 
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