Thank you for viewing from among the many items on display. A specialized book on reactive messaging patterns using Scala and Akka's actor model. The author's signature is written inside (see image 3). Also, some pages have creases (see image 4). - Title: Reactive Messaging Patterns with the Actor Model - Author: Vaughn Vernon - Publisher: Addison-Wesley - Signature: Signed by the author Thank you for reading to the end. 【AA0003】