The six tourists had been trekking in a Himalayan meadow when they were kidnapped by a militant group called Al-Faran. One American escaped, but a Norwegian was found dead and the four others were never found.
India said the militants were backed by Pakistan.
But the book "The Meadow: Kashmir 1995—Where the Terror Began" suggests India prolonged the crisis to damage Pakistan's reputation and hired different militants to take hostages before they were killed.
Kashmir's State Human Rights Commission said Tuesday it will discuss its findings May 28.