New Delhi, July 7 -- Since that literary encounter, the 44-year-old Hillmann has run with the bulls in Spain hundreds of times, counting both his trips to Pamplona and his participation in dozens more bull runs in other Spanish towns. His infatuation with Hemingway and Pamplona has never waned, even though he nearly died one time that he was gored by a bull horn.

Hillmann's appreciation led him to earn a doctorate in English, and now it is his turn to teach "The Sun Also Rises" at East-West University in Chicago, and write about bull running.

Americans are the biggest group of foreign bull runners

Hillmann is just one of many Americans inspired to travel to Spain to see the festival firsthand. Americans are still the leading group of f...