Question: is song of solomon in the old testament

Answer: Yes, The Song of Songs, also Song of Solomon or Canticles (Hebrew: שִׁיר הַשִּׁירִים‬, Šîr HašŠîrîm, Greek: ᾎσμα ᾎσμάτων, asma asmaton, both meaning Song of Songs), is one of the megillot (scrolls) found in the last section of the Tanakh, known as the Ketuvim (or ``Writings''), and a book of the Old Testament.