What do 'Is by' and 'Has by' mean? - The book's by T.C. Smith. What is that ['s] in that sentence? Is it 'Is' or 'Has'? So, - The book is by T.C. Smith. - The book has by T.C. Smith. Would someone please tell me what 'Is by' and 'has by' mean? I see that sentence here: http://goo.gl/GlzOkf