add /author/list

README.md

@@ -110,6 +110,17 @@ author.name   # => author name
 author.link   # => link to author's Goodreads page
 ```
 
+Look up books by an author:
+
+```ruby
+author = client.author_Book("id")
+
+author.id     # => author id
+author.name   # => author name
+author.link   # => link to author's Goodreads page
+author.books  # => array of books by this author
+```
+
 ### Reviews
 
 Pull recent reviews:

lib/goodreads/client/authors.rb

@@ -8,6 +8,14 @@ def author(id, params = {})
       Hashie::Mash.new(data["author"])
     end
 
+    # Get an author's books
+    #
+    def author_books(id, params = {})
+      params[:id] = id
+      data = request("/author/list", params)
+      Hashie::Mash.new(data["author"])
+    end
+
     # Search for an author by name
     #
     def author_by_name(name, params = {})

spec/client_spec.rb

@@ -262,6 +262,23 @@
     end
   end
 
+  describe "#author_books" do
+    before do
+      stub_with_key_get("/author/list", { id: "18541" }, "author_books.xml")
+    end
+
+    it "returns author's books" do
+      author = client.author_books("18541")
+
+      expect(author).to be_a(Hashie::Mash)
+      expect(author.id).to eq("18541")
+      expect(author.name).to eq("Tim O'Reilly")
+      expect(author.link).to eq("https://www.goodreads.com/author/show/18541.Tim_O_Reilly")
+
+      expect(author.books.book.size).to eq(30)
+    end
+  end
+
   describe "#user" do
     before { stub_with_key_get("/user/show", { id: "878044" }, "user.xml") }