Story books are 2/5, and the sum of science and technology books and literature books is1-2/5 = 3/5;

Science and technology books account for 7/(7+8)=7/ 15 of the total number of science and technology books and literature and art books, and science and technology books account for 3/5×7/ 15=7/25.

Literature and art books account for 8/(7+8)=8/ 15 of the sum of science and technology books and literature and art books, and 3/5×8/ 15=8/25.

144 is equivalent to 2/5-8/25=2/25 of the total number of three books.

Total number of three books = 144÷2/25

= 144×25/2

= 1800 copies

Storybook = 1800×2/5=720.

Science and technology books = 1800×7/25=504.

Literature books = 1800×8/25=576.