diff --git a/README.md b/README.md
index 682a38a..a8d1204 100644
--- a/README.md
+++ b/README.md
@@ -1,22 +1,114 @@
 # react-native-contentpass
 
-Contentpass React Native SDK
+Contentpass React Native SDK enables easy integration of Contentpass functionality into your React Native applications.
 
 ## Installation
+Install the package using npm or Yarn:
 
 ```sh
 npm install react-native-contentpass
 ```
 
+or
+
+```sh
+yarn add react-native-contentpass
+```
+
+### Peer Dependencies
+The following peer dependencies must also be installed:
+- [react](https://github.com/facebook/react) (Required for React Native projects.)
+- [react-native](https://github.com/facebook/react-native) (Core React Native framework)
+- [react-native-app-auth](https://github.com/FormidableLabs/react-native-app-auth) (Used for OAuth 2.0 authentication)
+- [react-native-encrypted-storage](https://github.com/emeraldsanto/react-native-encrypted-storage) (Ensures secure storage of authentication tokens)
+
+Some dependencies require additional setup in the native code. Refer to their official guides:
+- [react-native-app-auth setup](https://commerce.nearform.com/open-source/react-native-app-auth/docs#setup)
+- [react-native-encrypted-storage setup](https://github.com/emeraldsanto/react-native-encrypted-storage?tab=readme-ov-file#installation)
+
+### Expo support
+If you are using Expo, you need to run the following command to enable modifications to the `ios` and `android` directories:
+
+```sh
+npx expo prebuild
+```
+
 ## Usage
 
+### Initialization
+Wrap your app's root component with ContentpassSdkProvider. The provider requires a configuration object (contentpassConfig) with the following properties:
+- `propertyId` - Your unique property ID
+- `issuer` - The OAuth 2.0 server URL (e.g. `https://my.contentpass.net`)
+- `redirectUrl` - the redirect URL of your app to which the OAuth2 server will redirect after the authentication
+
+
+```jsx
+import React from 'react';
+import { ContentpassSdkProvider } from 'react-native-contentpass';
+
+const contentpassConfig = {
+  propertyId: 'your-property-id',
+  issuer: 'https://my.contentpass.net',
+  redirectUrl: 'com.yourapp://oauthredirect',
+};
+
+const App = () => {
+  return (
+    <ContentpassSdkProvider contentpassConfig={contentpassConfig}>
+      <YourApp />
+    </ContentpassSdkProvider>
+  );
+};
+
+export default App;
+```
+
+### SDK Methods
+The SDK exposes the following methods through the `useContentpassSdk` hook:
+
+### authenticate
+Initiates the OAuth 2.0 authentication process via a modal interface. It validates the user’s active Contentpass subscriptions
+upon successful authentication.
+
+### registerObserver
+Registers a callback function to listen for changes in the user’s authentication and subscription status. The observer function
+receives a state object describing the current status (see the exported [ContentpassState](./src/types/ContentpassState.ts) type).
+
+### unregisterObserver
+Unregisters a previously registered observer. The observer will no longer receive updates.
+
+### logout
+Logs the user out by clearing all stored authentication tokens.
+
+### recoverFromError
+During background token refresh, an error state may occur due to poor or no internet connection. This is indicated by the
+`state` switching to `ERROR`. The state object includes a reference to the original exception that was thrown. As the SDK
+does not monitor the device's connection state, you must notify the SDK when the network connection has been reestablished
+or improved. The SDK will then refresh and revalidate the user's authentication tokens.
+
+```jsx
+import React, { useEffect } from 'react';
+import { useContentpassSdk } from 'react-native-contentpass';
+
+const YourApp = () => {
+  const { authenticate, registerObserver, unregisterObserver, logout, recoverFromError } = useContentpassSdk();
+
+  useEffect(() => {
+    const observer = (state) => {
+      console.log('Contentpass state changed:', state);
+    };
 
-```js
-import { multiply } from 'react-native-contentpass';
+    registerObserver(observer);
 
-// ...
+    return () => {
+      unregisterObserver(observer);
+    };
+  }, []);
 
-const result = await multiply(3, 7);
+  return (
+    <button onClick={authenticate}>Authenticate</button>
+  );
+};
 ```
 
 
diff --git a/sharedExample/src/ContentpassUsage.tsx b/sharedExample/src/ContentpassUsage.tsx
index e5d6a05..4f52427 100644
--- a/sharedExample/src/ContentpassUsage.tsx
+++ b/sharedExample/src/ContentpassUsage.tsx
@@ -11,11 +11,15 @@ import {
 import setupSourcepoint from './setupSourcepoint';
 
 const styles = StyleSheet.create({
-  sourcepointDataContainer: {
+  scrollViewLogsContainer: {
     padding: 10,
-    height: 400,
+    height: 200,
     flexGrow: 0,
   },
+  resultsText: {
+    marginTop: 20,
+    fontWeight: 'bold',
+  },
   buttonsContainer: {
     display: 'flex',
     gap: 4,
@@ -84,10 +88,12 @@ export default function ContentpassUsage() {
         <Button title={'Logout'} onPress={contentpassSdk.logout} />
       </View>
       <View style={styles.logsView}>
-        <Text>Authenticate result:</Text>
-        <Text>{JSON.stringify(authResult, null, 2)}</Text>
-        <Text>Sourcepoint user data:</Text>
-        <ScrollView style={styles.sourcepointDataContainer}>
+        <Text style={styles.resultsText}>Authenticate result:</Text>
+        <ScrollView style={styles.scrollViewLogsContainer}>
+          <Text>{JSON.stringify(authResult, null, 2)}</Text>
+        </ScrollView>
+        <Text style={styles.resultsText}>Sourcepoint user data:</Text>
+        <ScrollView style={styles.scrollViewLogsContainer}>
           <Text>{JSON.stringify(sourcepointUserData, null, 2)}</Text>
         </ScrollView>
       </View>
diff --git a/src/Contentpass.test.ts b/src/Contentpass.test.ts
index 48f8c53..0a7aad7 100644
--- a/src/Contentpass.test.ts
+++ b/src/Contentpass.test.ts
@@ -186,7 +186,7 @@ describe('Contentpass', () => {
       expect(contentpassStates).toHaveLength(2);
       expect(contentpassStates[1]).toEqual({
         state: 'ERROR',
-        error: 'Authorize error',
+        error,
       });
     });
 
@@ -213,7 +213,8 @@ describe('Contentpass', () => {
       contentpass.registerObserver((state) => {
         contentpassStates.push(state);
       });
-      fetchContentpassTokenSpy.mockRejectedValue(new Error('Fetch error'));
+      const error = new Error('Fetch error');
+      fetchContentpassTokenSpy.mockRejectedValue(error);
 
       await contentpass.authenticate();
 
@@ -223,7 +224,7 @@ describe('Contentpass', () => {
       expect(contentpassStates).toHaveLength(2);
       expect(contentpassStates[1]).toEqual({
         state: 'ERROR',
-        error: 'Fetch error',
+        error,
       });
     });
 
@@ -410,13 +411,14 @@ describe('Contentpass', () => {
         contentpassStates.push(state);
       });
 
-      authorizeSpy.mockRejectedValue(new Error('Authorize error'));
+      const error = new Error('Authorize error');
+      authorizeSpy.mockRejectedValue(error);
 
       await contentpass.authenticate();
 
       expect(contentpassStates[1]).toEqual({
         state: 'ERROR',
-        error: 'Authorize error',
+        error,
       });
 
       await contentpass.recoverFromError();
diff --git a/src/Contentpass.ts b/src/Contentpass.ts
index ff77fd0..e3cc434 100644
--- a/src/Contentpass.ts
+++ b/src/Contentpass.ts
@@ -57,7 +57,7 @@ export default class Contentpass {
 
       this.changeContentpassState({
         state: ContentpassStateType.ERROR,
-        error: 'message' in err ? err.message : 'Unknown error',
+        error: err,
       });
       return;
     }
@@ -133,7 +133,7 @@ export default class Contentpass {
     } catch (err: any) {
       this.changeContentpassState({
         state: ContentpassStateType.ERROR,
-        error: err.message || 'Unknown error',
+        error: err,
       });
     }
   };
diff --git a/src/index.tsx b/src/index.tsx
index d547522..d8199df 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -1,5 +1,6 @@
 export type {
   ContentpassState,
+  ContentpassStateType,
   ErrorState,
   AuthenticatedState,
   InitialisingState,
@@ -9,7 +10,7 @@ export type {
 export type { ContentpassConfig } from './types/ContentpassConfig';
 
 export {
-  default as Contentpass,
+  type default as Contentpass,
   type ContentpassObserver,
 } from './Contentpass';
 
diff --git a/src/types/ContentpassState.ts b/src/types/ContentpassState.ts
index 70d42ef..39d5890 100644
--- a/src/types/ContentpassState.ts
+++ b/src/types/ContentpassState.ts
@@ -28,7 +28,7 @@ export type AuthenticatedState = {
 export type ErrorState = {
   state: ContentpassStateType.ERROR;
   hasValidSubscription?: never;
-  error: string;
+  error: unknown;
 };
 
 export type ContentpassState =