This work is Thomas Jefferson: Basic Writings, ISBN 1568525087 or 9781568525082, published by Konecky & Konecky. According to WorldCat it has 485 pages with a height of 24 cm.

This is almost certainly a different selection from The Basic Writings of Thomas Jefferson edited by Philip S. Foner, published by Willey Book Company and later republished by Halcyon House, 816 pages with a height of 23.5 cm.

Please do not combine unless you are certain that they do, in fact, have the same contents. Thank you.