Mac Donnell said he has been collecting Twain books and memorabilia since 1968. What triggered his obsession was a trip to a used bookstore. " I had $3 in my pocked and I found two books. One was a 1933 first school edition of the Webster's Dictionary. It was $3. The other one was a book by Mark Twain, "Europe and Elsewhere," a neat collection of essays, a first edition, from 1923. It was $5," he said. "I really wanted that book. It looked so much more interesting to me. But I only had $3 so I bought the dictionary. But I couldn't stop thinking about the Mark Twain book."