We did six walks from the book. All of them were shortened versions of the original longer walk.
The book is extremely helpful on arranging the logistics of how to reach the stating point and returning from a walk.
Most walks are very clear and precise, but sometimes the times are not accurate so one should walk carefully and pay attention.
To summarize, if you want a taste of the natural splendor of Peleponnese, this book is a must. (Walks 23 is very confusing so one should start early and have patience for the "barely-used trail through bush hillsides")