I started reading recently, and I found an interesting book at the library called Descartes's notebook. I started reading recently, and I found an interesting book at the library called Descartes's notebook.

I would combine these two clauses together.

And I found an interesting book at the library, Descartes's notebook. I found an interesting book at the library, Descartes's notebook.

There's not really a need for and here but you could also have just make this one sentence or gone with "And, I..." is the title Descartes Notebook?

And I found an interesting book at the library, Descartes's notebook.

I put this one above with the first.

It's about the creator of the cCartesian pPlane and the aAnalytical gGeometry. It's about the creator of the Cartesian Plane and the Analytical Geometry.

I believe these are proper nouns. Cartesian is even if Cartesian Plane isn't.

It's about the creator of the cartesian plan and the analytical geometry. It's about the creator of the cartesian plan and analytical geometry.

There is no article when talking about a subject matter: I study geometry, I like psychology etc.

It's about the creator of the cCartesian plane and the analytical geometry. It's about the creator of the Cartesian plane and analytical geometry.

The author starts the book with presenting how one of the greatest mathmatican obtained some samples from Descartes's notebook. The author starts the book with presenting how one of the greatest mathmatican obtained some samples from Descartes's notebook.

The author starts the book withby presenting how one of the greatest mathematicians obtained some samples from Descartes's notebook. The author starts the book by presenting how one of the greatest mathematicians obtained some samples from Descartes's notebook.

The author starts the book withby presenting how one of the greatest mathematicians obtained some samples from Descartes's notebook. The author starts the book by presenting how one of the greatest mathematicians obtained samples from Descartes's notebook.

After that the notebook disapeared forever. After that the notebook disapeared forever.

This is a little weird because the sentence before is about how the author started the book not about the history. You may have need a single longer sentence, unfortunately.

After that, the notebook disappeared forever. After that, the notebook disappeared forever.

Then the autor startproceeds with Descartes's biography, about; discussing his childhood and how he started to learn about science at Ludving IV's castle that was given to the church. Then the autor proceeds with Descartes's biography; discussing his childhood and how he started to learn about science at Ludving IV's castle.

you are using "starts with" repetitively, I'm not sure what the second half of this sentence means but it is definitely needing to be rewritten so I just removed the confusing parts.

Then the autor starts with Descartes's biography, about his childhood, and how he sarted to learn about science at Ludving IV's castle that was given to the church. Then the autor starts with Descartes's biography, about his childhood, and how he sarted to learn about science at Ludving IV's castle that was given to the church.

Then the author starts with Descartes's biography, talking about his childhood and how he started to learn about science at Ludving IV's castle that was given to the church. Then the author starts with Descartes's biography, talking about his childhood and how he started to learn about science at Ludvig IV's castle that was given to the church.

After Descartes had finished his studies, he will startbegan looking for knowledge and adventure. After Descartes had finished his studies, he began looking for knowledge and adventure.

will is future tense here which is baffling.

After Descartes had finished his studies, he will started looking for knowledge and adventure. After Descartes had finished his studies, he started looking for knowledge and adventure.

After X, he will start Y. Gives the impression that he has not started Y yet.

After Descartes had finished his studies, he will started looking for knowledge and adventure. After Descartes finished his studies, he started looking for knowledge and adventure.

For that he will join voluntaryjoined the army, and will assisted in different battles. For that he joined the army, and assisted in different battles.

assisted is a strange way to say participates but I'm not sure if you have a different idea here.

ForTo that he will join voluntaryend, he joined the army, and wills a volunteer and assisted different battles. To that end, he joined the army as a volunteer and assisted different battles.

For that, he will join voluntaryjoined the army, and will assists a volunteer and served in different battles. For that, he joined the army as a volunteer and served in different battles.

This period had also played a big part in his development as he founded new friendships with differenet famous mathematicians and phiysicians.sts This period had also played a big part in his development as he founded new friendships with different famous mathematicians and physicists

physicians or physicists?

This period had also played a big part in his development as he founded new friendships with diferenet famous mathematicians and phiysicians. This period had also played a big part in his development as he founded new friendships with diferenet famous mathematicians and physicians.

This period had also played a big part in his development as he founded new friendships with differenet famous mathematicians and phiysicians. This period had also played a big part in his development as he founded new friendships with different famous mathematicians and physicians.

His love for science did amplifyied in this period, he developed a new knowledge about philosophy, mathematics and pishhysics. His love for science amplified in this period, he developed a new knowledge about philosophy, mathematics and physics.

spell check will save you from many corrections!

His love for science did amplify in this period, he developed a new knowledge about philosophy, mathematics and pishhysics. His love for science did amplify in this period, he developed new knowledge about philosophy, mathematics and physics.

His love for science did amplifygrew in this period, and he developed a new knowledge about philosophy, mathematics and pishhysics. His love for science grew in this period, and he developed a new knowledge about philosophy, mathematics and physics.

He had strange dreams about life that made him think it's a sign for himhe understood as a sign. He had strange dreams about life that he understood as a sign.

Trying to express his knowledge through books was an empty useless idea because the catholic church was destroying everything that was wrong from their perspective or against "God's will". Trying to express his knowledge through books was a useless idea because the catholic church was destroying everything that was wrong from their perspective or against "God's will".

Trying to express his knowledge through books was an empty idea because the cCatholic cChurch was destroying everything that was wrong from their perspective or "God's will". Trying to express his knowledge through books was an empty idea because the Catholic Church was destroying everything that was wrong from their perspective or "God's will".

Trying to express his knowledge through books was an empty idea because the cCatholic cChurch was destroying everything that was wrong from their perspective or "God's will". Trying to express his knowledge through books was an empty idea because the Catholic Church was destroying everything that was wrong from their perspective or "God's will".

I'm not familiar enough with the context to 100% understand this unfortunately