He hired researchers to produce a book that could answer such questions. It sold quickly and became a huge ____ success. (COMMERCE)

In recent years, the book has increasingly focused on records set during ____ competitions, such as sword swallowing. (CONVENTIONAL)

It is also full of statistics concerning ____ natural features such as the world's highest mountains. (IMPRESS)

And found that none of the books in his library were ____ in giving him the answer. (HELP)

But it is more than just a ____ source of amazing facts. (RELY)

The organisation that produces the book is also now responsible for checking the ____ and accuracy of every new world record. (TRUE)

It all started in 1951 when Hugh Beave, the Managing Director of a large British company, got into an ____ about which bird was the fastes in the world. (ARGUE)

It contains a _____ of facts and figures about incredible human achievement. (COLLECT)