Topics are a way that content is organized in O'Reilly.
Go to Topics from the left navigation bar.
1) You can browse any topic
2) You will also get news and recommendations: New in your topics, Recommended for you and Popular topics.
When you first activate your account, you’ll be prompted to select a few topics of interest to you. You can also add or remove your selected topics at any time:
Click the Topics icon from the left navigation bar:
Pull down the “Jump to Topic” menu to browse all topics.
In a topic box, click “Follow” to add the topic or “I’m not interested” to remove a topic
You can also remove topics by clicking the Settings icon in the left navigation bar and click the “Your Topics” link on the left side. Click a topic to remove it from your list.