Upon receiving the assessment roll for any general improvement or divisional district authorized herein, the county treasurer shall prepare therefrom an assessment book in which shall be written the descriptions of the land as they appear in the assessment roll, the name of the owner or owners where known, and if assessed to unknown owners then the word "unknown", and the total assessment levied against each tract of land. Proper space shall be provided in said book for the entry therein of all subsequent proceedings relating to the payment and collection of said assessments.