Seven Cradle Songs is a book by Ackerly-Green Publishing.
During Fragment Seven, it was revealed that Seven Cradle Songs was stored in the Morgan Library. The book held a letter from Sullivan Green to his daughter, Deirdre Green. The book was originally found by The Mountaineers with the help of Cole Sumner, but was stolen by Lauren Ellsworth who believed that it could rescue The Cagliostro from the cult that enslaved him. The current status of the book is unknown, but it is likely still held in The Cagliostro's loft.