Dutch NSDAP Kids Book 'De Swetten ûtlein'

In a very good condition and hard to find a Dutch National Socialistic Kids book written in Nord Dutch language (Frisian) De Swetten ûtlein (De grenzen verwijd). The book is written by Rintsje Piter Sybesma, meber of the NSB and NSDAP. The book is dated 1942 and extreme hard to find!