Read from the LVD K2 book:
Chapter 4.6 Travel Documents and the Schengen Agreement.
Chapter 4.7 Electronic Travel Authorizations.
Complete from the LVD K2 book:
Assignments 4.23 and 4.24 Schengen Agreement and Border Control.
Assignments 4.25 and 4.26 Visa, API, and ESTA.