I’m glad someone mentioned the Mnemonica book. I bought a brick of Maiden backs and they are in a random (seemingly) order. The top card is a 4 of clubs and the bottom is a 9 of diamonds. I asked someone what was going on and they suggested that book, but nothing else. It is $60. I don’t mind spending $60 on a $60 product. But I have no idea what this book has to offer. Testimony? Advice? Instructions? How to guide? In the mean time, I haven’t shuffled the decks... I don’t know what the reason is for the cards to be in the order but I know that they are like that for some reason
Yes that is to be used with Mnemonica. Feel free to shuffle them and use them, you can put them back if you want. The book offers all of the things you mentioned. How to learn Menmonica, tricks, general advice etc.
You can find free PDF called Memories are Made of This on Simon Aronson's webite which will give you an introduction to this type thing. He uses a different system than Mnemonica, but you'll get the idea. Si Stebbins is also another less committal route to go. This subject is it's own rabbit hole and having a brick of cards that comes like that should not be the deciding factor on which route you take. There is Redford, Aragon, Ortiz and others. I use a variation of Mnemonica for my own reasons. If you don't mind spending the $60 as research, get the book. I have a few different books with different systems even though I only use one and I'm okay with that. If you'd like to focus your resources more, then read the PDF above and come back and start a new thread. We haven't had a good 'which one should I learn' thread on this subject in a while. You can also search old threads too, but new things happen so it's always good to see what the current thinking is. You should definitely poke your head in this rabbit hole, but you can save a lot of time and maybe some money with a bit of research.
If you are new to card magic then just shuffle the cards and, as is always a good idea, take the advice above from RealityOne. That being to buy Card College and Art of Astonishment. Mnemonica, Aronson, Redford and the others will still be there and your time will be better spent. For now. There is little you can do with Mnemonica and the others without the type of material taught in Card College.