chore: regens API reference docs (#889)

diff --git a/docs/dyn/books_v1.series.html b/docs/dyn/books_v1.series.html
index 011b154..30898df 100644
--- a/docs/dyn/books_v1.series.html
+++ b/docs/dyn/books_v1.series.html
@@ -100,7 +100,27 @@
         "bannerImageUrl": "A String",
         "title": "A String",
         "imageUrl": "A String",
+        "seriesFormatType": "A String",
+        "isComplete": True or False,
+        "subscriptionId": "A String",
+        "eligibleForSubscription": True or False,
         "seriesType": "A String",
+        "seriesSubscriptionReleaseInfo": {
+          "cancellationTimestampUs": "A String", # Cancellation date of the series subscription (or when it ends).
+          "currentReleaseInfo": { # Release information for the last release.
+            "currencyCode": "A String", # Currency code of the amount.
+            "releaseTimestampUs": "A String", # The release date.
+            "amountInMicros": "A String", # Amount in micros of the specified currency code.
+            "releaseNumber": "A String", # The release number of this issue/volume/book.
+          },
+          "seriesSubscriptionType": "A String", # series subscription type.
+          "nextReleaseInfo": { # Release information for the next release.
+            "currencyCode": "A String", # Currency code of the amount.
+            "releaseTimestampUs": "A String", # The release date.
+            "amountInMicros": "A String", # Amount in micros of the specified currency code.
+            "releaseNumber": "A String", # The release number of this issue/volume/book.
+          },
+        },
       },
     ],
     "kind": "books#series", # Resource type.