Well, considering she may have designed or may have not designed these Lenormand cards we use today, it's doubtful there is a good source, I don't know such one. LOL Many people claim to be authors but none have proven anything. Her biography, her memoirs - you van google them on the French google and that's the best source about her life. Her fortune-telling though is surrounded by mystery and she wanted it that way.
Good sources are available on meanings, combos, etc. But on the history of cards that may have never been designed by Mlle Lenormand - not really. In difference from Rider Waite's Tarot, for example, Mlle Lenormand's cards have no such clear history. In fact, she may have used simple playing cards, 36, and her own divination system applied to them.