This Book of Centuries replicates the format sold by the P.N.E.U. as described in The Parents’ Review. The only additions I have made is an extra page at the end to include the 21st century and listing the years included included in each century at the top of the page.At the start of the book is a section for the student to describe some past time periods as well as two spreads for each to draw things found in those times. This is followed by five spreads, each representing a millenia. From 5400 b.c. through to 2100 a.d., each representing a single century. The last five spreads are saved for the drawing of maps and recording details specific to them.Five years are recorded along each line in the book, with markers at the top and bottom of each page to easily deliniate the columns and make placing events in the right time easier.