Title: Song of Songs 1
Content:  Song of Songs 1 (abbreviated as Song 1) is the first chapter of a book called "Song of Songs" or "Song of Solomon" in the Hebrew Bible or the Old Testament of the Christian Bible. This book is one of the Five Megillot, a collection of short books, together with Book of Ruth, Lamentations, Ecclesiastes and Esther, within the Ketuvim, the third and the last part of the Hebrew Bible. Jewish tradition views Solomon as the author of this book, and this attribution influences the acceptance of this book as a canonical text, although this is now largely disputed. This chapter contains the superscription, songs of the main female characters and the opening song of the male character.
Title: Song of Songs 7
Content:  Song of Songs 7 (abbreviated as Song 7) is the seventh chapter of the Song of Songs in the Hebrew Bible or the Old Testament of the Christian Bible. This book is one of the Five Megillot, a collection of short books, together with Book of Ruth, Lamentations, Ecclesiastes and Esther, within the Ketuvim, the third and the last part of the Hebrew Bible. Jewish tradition views Solomon as the author of this book, and this attribution influences the acceptance of this book as a canonical text, although this is at present largely disputed. This chapter contains a descriptive poem by the man and the invitation of the woman for the man.
Title: Song of Songs 3
Content:  Song of Songs 3 (abbreviated as Song 3) is the third chapter of the Song of Songs in the Hebrew Bible or the Old Testament of the Christian Bible. This book is one of the Five Megillot, a collection of short books, together with Book of Ruth, Lamentations, Ecclesiastes and Esther, within the Ketuvim, the third and the last part of the Hebrew Bible. Jewish tradition views Solomon as the author of this book, and this attribution influences the acceptance of this book as a canonical text, although this is at present largely disputed. This chapter contains a female song about her search for her lover at night and the poem describing King Solomon's procession.
Title: Song of Songs 1
Content: The song of songs, which is Solomon's. The "song of songs" (שיר השירים,  ha- ): The form of the words indicates a superlative statement as the "Best Song", but can also denote "a single poem composed of many poems". ; "Song" (Hebrew: שיר, ; also meaning "poem") in noun form appears only here in this book, out of 166 times in the Hebrew Bible (mostly in the Book of Psalms). ; "Which is Solomon's" ("that concerns Solomon"; Hebrew: אשר לשלמה,  li ): can have the interpretation that (1) Solomon is the author; (2) the book is dedicated to Solomon; or (3) it was merely a 'part of royal holding'. ; "Solomon": outside twice this first chapter (verse 1, 5), his name is only mentioned in two other passages (3 times in and 2 times in the last chapter ), for a total of seven times in the whole book. The verse is a detached description of the book content, containing two phrases: "the song of songs" and "which is Solomon's".
Title: Song of Songs 4
Content:  Song of Songs 4 (abbreviated as Song 4) is the fourth chapter of the Song of Songs in the Hebrew Bible or the Old Testament of the Christian Bible. This book is one of the Five Megillot, a collection of short books, together with Book of Ruth, Lamentations, Ecclesiastes and Esther, within the Ketuvim, the third and the last part of the Hebrew Bible. Jewish tradition views Solomon as the author of this book, and this attribution influences the acceptance of this book as a canonical text, although this is at present largely disputed. This chapter contains the man's descriptive poem of the woman's body and the invitation to be together which is accepted by the woman.
Title: Song of Songs 6
Content:  Song of Songs 6 (abbreviated as Song 6) is the sixth chapter of the Song of Songs in the Hebrew Bible or the Old Testament of the Christian Bible. This book is one of the Five Megillot, a collection of short books, together with Book of Ruth, Lamentations, Ecclesiastes and Esther, within the Ketuvim, the third and the last part of the Hebrew Bible. Jewish tradition views Solomon as the author of this book, and this attribution influences the acceptance of this book as a canonical text, although this is at present largely disputed. This chapter contains a dialogue between the daughters of Jerusalem and the woman about the man, followed by the man's descriptive poem of the woman, ending with a collective call to the woman to return.
Title: Song of Songs 2
Content:  Song of Songs 2 (abbreviated as Song 2) is the second chapter of the Song of Songs in the Hebrew Bible or the Old Testament of the Christian Bible. This book is one of the Five Megillot, a collection of short books, together with Book of Ruth, Lamentations, Ecclesiastes and Esther, within the Ketuvim, the third and the last part of the Hebrew Bible. Jewish tradition views Solomon as the author of this book, and this attribution influences the acceptance of this book as a canonical text, although this is at present largely disputed. This chapter contains a dialogue in the open air and several female poems with the main imagery of flora and fauna.
Title: Song of Songs 5
Content:  Song of Songs 5 (abbreviated as Song 5) is the fifth chapter of the Song of Songs in the Hebrew Bible or the Old Testament of the Christian Bible. This book is one of the Five Megillot, a collection of short books, together with Book of Ruth, Lamentations, Ecclesiastes and Esther, within the Ketuvim, the third and the last part of the Hebrew Bible. Jewish tradition views Solomon as the author of this book, and this attribution influences the acceptance of this book as a canonical text, although this is at present largely disputed. This chapter contains a few parts starting with the man's response to the woman's acceptance of his invitation; the second part is the refusal of the woman to welcome the man into her room at night, and when she changes her mind, he already disappears; in the next part she looks for him in the city and in the last part she describes how fair the man is to the daughters of Jerusalem.
Title: Song of Songs 8
Content:  Song of Songs 8 (abbreviated as Song 8) is the eighth (and the final) chapter of the Song of Songs in the Hebrew Bible or the Old Testament of the Christian Bible. This book is one of the Five Megillot, a collection of short books, together with Book of Ruth, Lamentations, Ecclesiastes and Esther, within the Ketuvim, the third and the last part of the Hebrew Bible. Jewish tradition views Solomon as the author of this book, and this attribution influences the acceptance of this book as a canonical text, although this is at present largely disputed. This chapter contains dialogues between the woman and the daughters of Jerusalem, the woman and her brothers, then finally, the woman and the man.
Title: Psalms of Solomon
Content:  One of the apocryphal books, the Psalms of Solomon is a group of eighteen psalms (religious songs or poems) written in the first or second centuries BC that are not part of any current scriptural canon (they are, however, found in copies of the Peshitta and the Septuagint).

Question: what book of the bible is the song of solomon in?
Answer: Song of Solomon.
Song of Songs.