In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.

Context: His private secretary at this time was V. Gordon Childe, later internationally famous in the field of archaeology, who wrote the book How Labor Governs, based on his experience as Storey's secretary. Link Information: Vere Gordon Childe (14 April 1892 19 October 1957) was an Australian archaeologist who specialised in the study of European prehistory. He spent most of his life in the United Kingdom, working as an academic for the University of Edinburgh and then the Institute of Archaeology, London, and wrote twenty-six books during his career Answer: twenty-six
How many books did V. Gordon Childe write?