Boundless by Bryan Bishop

A trip around the world to see if following Jesus can be done within the culture of other religions. For example, can one follow Jesus and remain a Muslim? As far as Islam is a culture and lifestyle and perhaps in some cases, propositionally relatively lax in some areas of observance and perhaps open to Jesus as being mentioned favorably in the Koran, one can remain in the Muslim culture yet follow Jesus as the ground of truth and righteousness and devotion and salvation.

Other examples in other cultures are given, and a chapter about the legitimacy also of "western" culture as a valid culture of Jesus-following (with also attendant syncretistic danger) is well done. Mostly the book raises questions and doesn't give firm answers. The key is to follow Jesus, where he leads and the Holy Spirit sheds light.