The answer to the crossword is OVID, a Roman poet who lived from 43 BC to 17 AD. He is best known for his work 'Metamorphoses, ' which is an epic poem about transformation and change. Ovid also wrote 'Ars Amatoria, ' which translates to 'The Art of Love, ' and is a collection of love poems. Ovid's works often focus on themes of love, passion, and carelessness, making him an appropriate answer to the clue 'Careless Love Author.'