The Ibrox disaster of 1971 still has the power to send shivers up and down footballing spines and not just in Scotland. Now the truth about the disaster that killed 66 people is finally on the record. Two of the game's best known researchers have unearthed the full story. In a new book about the disaster that followed a New Year Old Firm game, Paul Collier and Donald Taylor demolish the myth that crowds of supporters crashing into each other on Stairway 13 at the Rangers ground in Glasgow caused the tragic deaths. Until now, it was believed it was Rangers' last minute goal against Celtic which brought departing fans surging back up the stairs straight into the tide of others coming down Stairway 13 that caused the death of those 66 people. But it wasn't. The reality is that the stairway was too steep and too narrow. Stairway 13 just couldn't cope with the number of supporters pouring out. It just wasn't big enough. One man probably slipped. Others fell on top. The rest piled up behind. Most of the dead were found still standing in a row like un-collapsed dominoes. The force was so massive their lives had been literally squeezed out where they stood. They were totally helpless. In writing "Stairway 13", co-authors Paul Collier and Donald Taylor went back over all the evidence in meticulous detail. They interviewed survivors, police officers, players, football officials, journalists and photographers and medical staff at the hospitals as well as poring over the evidence from the original enquiry. The new book contains the very last words of footballing legend George Best who wrote the foreword just before his death in 2005. He says he hopes the work will stand as "a fitting tribute to those Rangers supporters who lost their lives that day supporting their team."