Text ( visual ) : unmediated On the shortness of life / Seneca ; translated by C.D.N. Costa. -- New York : Penguin Books , 2005. -- 105 p. ; 18 cm. -- (Penguin books ; . Great ideas). -- "First published in Dialogues and letters in Penguin Classics 1997"--T.p. verso ; "This selection first published in Penguin Books (U.K.) 2004"--T.p. verso. -- ISBN 9780143036326 ; (BB17784686) ; https://ci.nii.ac.jp/ncid/BB17784686 Other Title(s): Dialogi. -- Author Heading(s): Seneca, Lucius Annaeus, ca. 4 B.C.-65 A.D. ; Costa, Charles Desmond Nuttall. -- Classification(s): LCC : B616.D532 ; DC22 : 188. -- Subject Heading(s): LCSH : Conduct of life