Ernest Hemingway Doesn't do Silly Love Stories

The forward to Hemingway's 1935, slightly-fictionalized novel Green Hills of Africa instructs readers to supply their own love story if they found the novel wanting in that department:

Unlike many novels, none of the characters or incidents in this book is imaginary. Any one not finding sufficient love interest is at liberty, while reading it, to insert whatever love interest he or she may have at the time. The writer has attempted to write an absolutely true book to see whether the shape of a country and the pattern of a month's action can, if truly presented, compete with a work of the imagination.