Conversation so far:
what is the kon-yiki expedition
The Kon-Tiki expedition was inspired by old reports and drawings made by the Spanish Conquistadors of Inca rafts, and by native legends.
when did the Kon-Tiki expedition take place?
In 1947, Thor Heyerdahl and five fellow adventurers sailed from Peru.
where all did the Kon-Tiki expedition sail to?
Thor Heyerdahl and five fellow adventurers sailed from Peru to the Tuamotu Islands, French Polynesia.
anyhing i should know about Thor Heyerdahl
The Kon-Tiki smashed into the reef at Raroia in the Tuamotus on August 7, 1947,
where did the wrecking of the Kon-Tiki take place?
The Kon-Tiki smashed into the reef at Raroia in the Tuamotus.
whats the Tuamotus island history
The Tuamotus, are a French Polynesian chain of almost 80 islands and atolls forming the largest chain of atolls in the world.
who is Thor heyerdahl
Thor Heyerdahl; October 6, 1914 – April 18, 2002) was a Norwegian adventurer and ethnographer with a background in zoology, botany, and geography.

Question: when did he write his book?
Self-contained rewrite: when did Thor Heyerdahl write his book?