Book review, Luontokuva magazine, 04/2020 / Esa Mälkönen:

“On the eastern edge of the Helsinki Metropolitan Area is Sipoonkorpi, a national park established in 2011. This book is an information package made to help the hiker with great and rich illustrations. 
Seppo Parkkinen is responsible for the text and Kai Hypén for the pictures (approx. 150) and the information content of the objects. The book deals with 35 different destinations. Each has its own map drawing, 1-2 landscape images, and one or more species images, mostly of plants, insects, and birds. Hypén's images are just right for their purpose, leaving a good pictorial image of the area and nature.
Parkkinen's text is fluent and appropriately informative. Maybe you’ll miss what the area feels and looks like in the winter time. Now the book is from a snow-free time with the exception of a few pictures and text. Hiking and the richness of nature will certainly focus on the area in the summer. Such books would like to be made of all the major nature hiking destinations. It's easy to decide with a detailed guide, where to go in the area and what to find there. ”