Possible Typos

book-content/chapters/05-unions-literals-and-narrowing.md

@@ -117,7 +117,7 @@ We could then specify `AlbumFormat` as a union of `DigitalFormat` and `PhysicalF
 type AlbumFormat = DigitalFormat | PhysicalFormat;
 ```
 
-Now, we can use the `DigitalFormat` type for functions that handle digital formats, and the `AnalogFormat` type for functions that handle analog formats. The `AlbumFormat` type can be used for functions that handle all cases.
+Now, we can use the `DigitalFormat` type for functions that handle digital formats, and the `PhysicalFormat` type for functions that handle physical formats. The `AlbumFormat` type can be used for functions that handle all cases.
 
 This way, we can ensure that each function only handles the cases it's supposed to handle, and TypeScript will throw an error if we try to pass an incorrect format to a function.
 

book-content/chapters/09-typescript-only-features.md

@@ -371,18 +371,18 @@ namespace RecordStoreUtils {
 }
 ```
 
-In this example, `AlbumCollection` is the main namespace, with `Sales` as a nested namespace. This structure helps in organizing the code by functionality and makes it clear which part of the application each function pertains to.
+In this example, `RecordStoreUtils` is the main namespace, with `Sales` as a nested namespace. This structure helps in organizing the code by functionality and makes it clear which part of the application each function pertains to.
 
-The stuff inside of the `AlbumCollection` can be used as values or types:
+The stuff inside of the `RecordStoreUtils` can be used as values or types:
 
 ```typescript
-const odelay: AlbumCollection.Album.Album = {
+const odelay: RecordStoreUtils.Album.Album = {
   title: "Odelay!",
   artist: "Beck",
   year: 1996,
 };
 
-AlbumCollection.Sales.recordSale("Odelay!", 1, 10.99);
+RecordStoreUtils.Sales.recordSale("Odelay!", 1, 10.99);
 ```
 
 ### How Namespaces Compile

book-content/chapters/14-configuring-typescript.md

@@ -17,6 +17,7 @@ To start, here's a recommended base `tsconfig.json` configuration with options a
     "isolatedModules": true,
     "strict": true,
     "noUncheckedIndexedAccess": true
+  }
 }
 ```
 

book-content/chapters/16-the-utils-folder.md

@@ -496,8 +496,9 @@ function assertIsAlbum(input: unknown): asserts input is Album {
     "artist" in input &&
     "year" in input
   ) {
-    throw new Error("Not an Album!");
+    return;
   }
+  throw new Error("Not an Album!");
 }
 ```
 
@@ -522,8 +523,9 @@ function assertIsAlbum(input: unknown): asserts input is Album {
     "artist" in input &&
     "year" in input
   ) {
-    throw new Error("Not an Album!");
+    return;
   }
+  throw new Error("Not an Album!");
 }
 // ---cut---
 function getAlbumTitle(item: unknown) {
@@ -548,8 +550,9 @@ For example, if the `assertIsAlbum` function doesn't check for all the required
 ```typescript
 function assertIsAlbum(input: unknown): asserts input is Album {
   if (typeof input === "object") {
-    throw new Error("Not an Album!");
+    return;
   }
+  throw new Error("Not an Album!");
 }
 
 let item = null;