Year B - Gospel of Mark - Jesus as Servant
Watch this 4-minute video for an introduction about the Gospel of Mark.
2nd Readings in the Sundays in Ordinary Time are on their own independent 3-year cycle from the Letters of St Paul.
Year B - 6 or 7 weeks on Ephesians
There will be other readings from the other books (for example, James)
Mass Readings Explained for Year B.