It's one of the most talked about publications of the year. It's not a new book. And it's not even a well-written book. But Mein Kampf, by Adolf Hitler, which hits German bookshops for the first time in 70 years on Friday, is certainly attracting attention. Hitler's anti-Semitic tirade is seen as the forerunner to the Holocaust. But that is also why historians want it republished. Hitler wrote it mostly while in prison in the mid-1920s, and academics say it helps explain the Nazis' crazed ideology when they came to power less than a decade later. As such, they say, it's a crucial academic text. Not pleasant reading, but essential to understanding the Holocaust and Hitler's brutal rule. Surprisingly, some Jewish groups have also supported this edition. This is an annotated, critical version, with thousands of academic notes. And without this republication, the only hard copies available in Germany would be the pre-1945 Nazi editions, still found in second-hand bookshops or online. Those are certainly not critical. The idea is that republishing Mein Kampf will help undermine it, according to BBC.