In those 46 pages, he goes into details regarding how the idea came up to him, why he took a sabbatical of 2 years (which ended up lasting to this day, he says

In those 46 pages, he goes into details regarding how the idea came up to him, why he took a sabbatical of 2 years (which ended up lasting to this day, he says at the end :D ), what he did during those 2 years (not only Clojure) and how he basically has no retirement savings left because of that.