diff --git a/book/source/05-private.md b/book/source/05-private.md
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--- a/book/source/05-private.md
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@@ -134,6 +134,8 @@ These essential operations require access only to the component keys and their a
 (key-store-design)=
 ## Private key stores
 
+This section examines the diverse architectures and operational mechanics of private key stores in OpenPGP. It focuses on the various design choices, their functional implications, and how they contribute to the secure management of private key material.
+
 ### Design options
 
 Designs of private key subsystems in the OpenPGP space differ: