The book "
Learning Lenormand" by Tali Goodwin and Marcus Katz has a very good chapter about the history of the Lenormand deck. It's impossible to squeeze into a forum post.
The deck has nothing to do with the historical fortune teller Marianne Lenormand; the name was just a marketing plot of the publishers. It developed from a
game that was based on a deck of cards (with only 36 cards, i.e. without the smaller pips) but used like a board game. A bit like Snakes and Ladders, but instead of a board, the cards were spread out. The symbols on the cards (dog, house, anchor...) either let you progress or fall back.
Later, these cards with symbols were used for fortune telling, and each card was associated with different motifs: it could describe a person, a situation, a health problem, a number or a place. The Lenormand meanings are very circumscribed and precise, they function like words that can be combined with other cards, and their interpretation is not influenced by the art of a specific deck you're using. It's possible to make your own Lenormand deck by simply writing the key words on pieces of paper.
Some readers take the playing card information on each card into account, others do it only for the court cards (which then relate to persons), and others disregard them completely.
Some cards are interpreted differently by French, German, Belgian, British or American authors, but that's not a problem - just decide which "school" you follow and forget the rest. It's like learning a language.
There are different techniques to get more information from the reading. You combine cards and look for patterns.
I found that tarot spreads are not useful for Lenormand, I prefer to read them in small groups (3x3) or just three cards in a line for concrete, practical questions. But I'm not very good with Lenormand (although I started learning Lenormand many years ago - but you need to read the cards, not only the books, if you want to get better
).
Experienced Lenormand readers lay out the whole deck, look for the card that representes the querent (Lady or Gentleman) and start to look at the whole tableau like a map. They get an amazing amount of concrete information, from these cards. There are knowledgeable people around here who can explain it all much better than I can.
Most Lenormand decks are very cheap and easy to come by. Definitely worth a try! My personal favorite book is the one by Andy Boroveshengra btw but there are quite a lot of good books nowadays.