While most of the other articles I've provided here only talk about the book itself, this article can not only be read as a pleasant Siddhartha summary, but it can also be utilized as a fantastic medium for many other books by Hermann Hesse. Some of these works include Steppenwolf, The Glass Bead Game, and Demian. This article also includes various details about Hesse's background, as well as a brief history of the actual publication of Siddhartha. Overall, this article is very useful if you want to know anything else about Siddhartha that any other article hasn't clearly defined to you yet.
This rather lengthy summary explains in detail many various aspects and properties of Siddhartha. It clearly explains the list of events that occur when Siddhartha encounters Buddha, among other events. However, if you haven't had the time to finish the book yet, you may want to exercise caution with how much of this you read, as it does contain some spoilers. Overall, though, very informative and can help you decide whether or not you want to read Siddhartha if you haven't decided yet.
This summary provides a thorough encapsulation of both factual and philosophical aspects of Siddhartha. It explains many key aspects of the story, such as how Siddhartha became awakened, and when Govinda points out to Siddhartha that he is awakened. This resource may not be suitable if you truly want to keep the integrity of the story true without exposing yourself to any overly revealing content about Siddhartha before reading. However, if you've already read the book or don't mind a few spoilers, then this article is easily a very helpful resource about the book itself.
Blog posts normally contain rather factual summaries and informational content. This one, however, contains much more descriptive use of philosophical views in order to express the true complexity of Siddhartha. While not overly long, it summarizes quite well the nature and philosophy of the book, without spoiling any important details that many prefer to experience themselves through reading it.
This summary of Siddhartha reflects on Siddhartha's personal experiences, and how they aided him in achieving the ultimate state of enlightenment. Though short, it encapsulates some of the main events in the story wonderfully, and clearly describes the pain and suffering that Siddhartha went through to get the knowledge he so patiently yet eagerly sought.