If you're considering buying this book you should know what you're in for. If you're expecting a biography of Henry Hudson you'll be disappointed. There is very little on Hudson in this book. What you get is a high-level overview of what Hudson is thought to have done and a whole lot of ramble on Corey Sandler's experiences visiting the places Hudson visited.
There's not a whole lot that's known about Hudson. What there is comes from a few brief surviving documents. You get the text from those documents word-for-word with little if any interpretation from the author. That's the real disappointment of this book. If I wanted to read the text of the original documents I'd look them up myself online. What I wanted was expert interpretation and the telling of the story that these documents seem to describe.
Sandler writes from Nantucket, an island he shares with the great historian Nathaniel Philbrick. But where Philbrick excels at taking scant information and turning it into a fascinating story, Sandler dumps the source information on the page and then rambles on about his own experiences in visiting the same places 400 years later. Unfortunately, it's just not very interesting. Thought you'd learn about Hudson's trip up the river that bears his name? You're going to get a little of that and then a whole lot of information on General Electric, PCBs, the environmental movement, and Pete Seeger.
An earlier reviewer characterized this book as being 1/3 history. I'd put it more at 1/10th. By the end of the book you'll know little about Hudson, but all about Sandler's political views, summer camp experiences, family, feelings, travel preferences, and a whole lot of other personal detail. If that's what you're looking to read about, you'll love it. But if you read the title and thought you were instead going to read a biography of Henry Hudson, you'll be disappointed.