Update docs for 1.4.1 release
diff --git a/docs/dyn/books_v1.volumes.associated.html b/docs/dyn/books_v1.volumes.associated.html
index 5f7dcf3..77c51d9 100644
--- a/docs/dyn/books_v1.volumes.associated.html
+++ b/docs/dyn/books_v1.volumes.associated.html
@@ -75,17 +75,21 @@
 <h1><a href="books_v1.html">Books API</a> . <a href="books_v1.volumes.html">volumes</a> . <a href="books_v1.volumes.associated.html">associated</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
-  <code><a href="#list">list(volumeId, source=None, locale=None, association=None)</a></code></p>
+  <code><a href="#list">list(volumeId, source=None, locale=None, maxAllowedMaturityRating=None, association=None)</a></code></p>
 <p class="firstline">Return a list of associated books.</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="list">list(volumeId, source=None, locale=None, association=None)</code>
+    <code class="details" id="list">list(volumeId, source=None, locale=None, maxAllowedMaturityRating=None, association=None)</code>
   <pre>Return a list of associated books.
 
 Args:
   volumeId: string, ID of the source volume. (required)
   source: string, String to identify the originator of this request.
   locale: string, ISO-639-1 language and ISO-3166-1 country code. Ex: 'en_US'. Used for generating recommendations.
+  maxAllowedMaturityRating: string, The maximum allowed maturity rating of returned recommendations. Books with a higher maturity rating are filtered out.
+    Allowed values
+      mature - Show books which are rated mature or lower.
+      not-mature - Show books which are rated not mature.
   association: string, Association type.
     Allowed values
       end-of-sample - Recommendations for display end-of-sample.
@@ -211,9 +215,11 @@
           "publisher": "A String", # Publisher of this volume. (In LITE projection.)
           "language": "A String", # Best language for this volume (based on content). It is the two-letter ISO 639-1 code such as 'fr', 'en', etc.
           "readingModes": "", # The reading modes available for this volume.
+          "allowAnonLogging": True or False, # Whether anonymous logging should be allowed.
           "title": "A String", # Volume title. (In LITE projection.)
           "printType": "A String", # Type of publication of this volume. Possible values are BOOK or MAGAZINE.
           "samplePageCount": 42, # Total number of sample pages as per publisher metadata.
+          "maturityRating": "A String",
           "printedPageCount": 42, # Total number of printed pages in generated pdf representation.
           "averageRating": 3.14, # The mean review rating for this volume. (min = 1.0, max = 5.0)
           "infoLink": "A String", # URL to view information about this volume on the Google Books site. (In LITE projection)