diff --git a/ch03_bitcoin-core.adoc b/ch03_bitcoin-core.adoc
index eb81665a..da800537 100644
--- a/ch03_bitcoin-core.adoc
+++ b/ch03_bitcoin-core.adoc
@@ -974,7 +974,7 @@ and testing functions. But the whole point of an API is to access functions prog
 will demonstrate accessing Bitcoin Core from another program.
 
 Bitcoin Core's API is a JSON-RPC interface. JSON stands for JavaScript
-Object Notation and it is a very convenient way to present data that
+Object Notation, and it is a very convenient way to present data that
 both humans and programs can easily read. RPC stands for Remote
 Procedure Call, which means that we are calling procedures (functions)
 that are remote (on the Bitcoin Core node) via a network protocol. In