The Wanderer (in the US) or The Sultan's Renegade (in the UK) is a 1949 historical novel by Mika Waltari.

The Wanderer tells the story of how Mikael converts from Christianity to Islam and rises to a high position in the court of Suleiman the Magnificent.

Many historical events are recounted in the book, but Mikael's involvement in them is fictitious.

The Mikael duology won the 1950 State Literary Prize of Finland.

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