"From Pole to Pole" is a book divided in two parts. The first one is solely dedicated to Hedin's expeditions which took him from Europe to Asia. It's a summary of all the places he visited during the late Eighteenth century and early 1900s.
Then, the second part deals with other continents and regions, and they are described by relating the voyages of the great explorers and adventurers of the past (namely Livingstone, Stanley, Shackleton, Franklin, etc.).
The book itself is intended as a description of the most relevant lands and their inhabitants in the world. And it is only in the first part when Hedin's own experiences and deeds are written. So, in that sense this is not a strictly work on Hedin's expeditions.
If you have never read a Hedin's book this might be good for you as an introduction to him. It might no be very detailed, because it tries to cover a lot of things in a single volume. However, there's enough material that could leave you wondering about Hedin's adventures, and probably it will leave you wanting to know more about his ever amazing stories.