Friendly fire - A. B. Yehoshua

A couple, long married, are spending an unaccustomed week apart. Amotz, an engineer, is busy juggling the day-to-day needs of his elderly father, his children, and his grandchildren. His wife, Daniella, flies from Tel Aviv to East Africa to mourn the death of her older sister. There she confronts her anguished seventy-year-old brother-in-law, Yirmiyahu, whose soldier son was killed six years earlier in the West Bank by ?friendly fire." Yirmiyahu is now managing a team of African researchers digging for the bones of man’s primate ancestors as he desperately strives to detach himself from every shred of his identity, Jewish and Israeli.