Thanks for the link! Don't expect an anti-war book like "All Quiet on the Western Front" though, he often writes in a rather glorifying way. Even more than "In Stahlgewittern" his diaries are a straight personal account, sometimes focusing on trivialities and horrific incidences with the same emotionally involvement. From historic view, you can see the change in tactics well and the subjective effects of trench warfare are quite apparent.
Considering his spectacular raiding operations and his involvement in so many large battles he was quite a lucky camper. Once he was among only a handful of survivors of his entire company. He reached an age of 102 years.