This is a set of two vintage science textbooks entitled "Cycles" published by MacMillan Reading in 1980. The books are paperback, 7.5 inches in length, 9 inches in height, and 1/4 inch in width. Each book includes 112 pages and is illustrated. The books are appropriate for intermediate level students in middle or elementary school and are written by various authors. They are great for anyone interested in learning about the subject of cycles.

Thanks for looking.

PLEASE LOOK AT THE PICTURES

One book has more wear than the other.  It's the one with more names. Overall, they are in good condition for the age.