How do you craft and recipe on this game i see you get a lot of books on recipe but i am a bit lost on how it works in Divinity - Original Sin does any body know this????

Simply just drag two items on each other in the inventory.
Sometimes you need to drag items into a forge, or a grindstone etc.

so its only trail and error???? becase when i have read a book i get a new recipe its only the same text as the book i did read

the book usually says something like "Using my knife on animal hides tured them ito something useful"
So knife+hide.

But trial-error works as well. I found many recipes by trying to stack items. For example I treid to stack wool, and I ended up making something else instead :)

Or sometimes you must think: without any spoilers, there is a quest wehere you must kill something, and lure it out at the same time. So think with crafting: a lure + something that kills = perfect bait.

yeah thats true but to craft or other thing you nedd to drag one too the other one and try the luck????
i did also find a library is there any point to leave the books there or any book you find????

See the link in my other reply.

The library has one very special book, but otherwise it's just a store with a theme.

its strange that inside the game is not like that in the link. strange the link did help a lot what to combine.

The books its soo hard to understand why make it soo hard

It's not meant to be easy. :)

is there any mod that you can use to craft inside the game that show you if you take this and this too make this???

I don't think such mod exist yet, since the game is very new, but I wouldn't be surprised if someone made a mod like this in the future.

For now you can rely on online craft-guides, like the one Hickory linked.

thx for all the help :)

In at least the case of making some potions, you get a quantity dialog that pops up and tells you what your combination will make and allow you to adjust the slider to make multiples at one time. The nice thing is that it tells you what your combination will net you before you commit to the combination. As an example, try some type of mushroom and an empty potion bottle.

i will try that and see what happed