diff --git a/book/sourdough-starter/sourdough-starter.tex b/book/sourdough-starter/sourdough-starter.tex
index 6c14976..a889933 100644
--- a/book/sourdough-starter/sourdough-starter.tex
+++ b/book/sourdough-starter/sourdough-starter.tex
@@ -156,7 +156,7 @@ than the ones from another starter. Some people have also reported
 how the microbes from your hand or air can influence your starter's
 microorganisms. This makes sense to a certain extent. Your
 hand's microbes might be good at fermenting your sweat, but
-probably not so good and metabolizing glucose. The contamination
+probably not so good at metabolizing glucose. The contamination
 of your hands or air might play a minor role in the initial epic
 battle. But only the fittest microbes fitting the sourdough's
 niche are going to survive. This means the microorganisms that know
@@ -319,7 +319,7 @@ yeast part of your sourdough and balance the fermentation.
 \end{figure}
 
 You have made your sourdough starter and your first bread. How do you perform
-maintenance for your starter? There are countless of different maintenance
+maintenance for your starter? There are countless different maintenance
 methods out there. Some people go completely crazy about their starter and
 perform daily feedings of the starter. The key to understanding how to properly
 conduct maintenance is to understand what happens to your starter after you