I take it you didn't sniff any deeper. From the text:
Gunnar Broberg’s biography dutifully accompanies Linnaeus every step of the way, trekking through his life for four-hundred-plus pages. These are not, unfortunately, a pleasure to read... The main problem with “The Man Who Loved Nature,” though, is not all the things in it we don’t need to know but all the things we need to know that aren’t in it.
Gunnar Broberg’s biography dutifully accompanies Linnaeus every step of the way, trekking through his life for four-hundred-plus pages. These are not, unfortunately, a pleasure to read... The main problem with “The Man Who Loved Nature,” though, is not all the things in it we don’t need to know but all the things we need to know that aren’t in it.
It's a book review.