Assigning variables to multiple gameobjects

I have 3 types of Gameobjects, (books) fic, romanace and nonfic.

I will assign three Gameobjects to 3 seperate arrays that store their variables. (or is there any better way?)

I want to assign them with variables such as title, author, size. The size will be generated randomly and then put into the array that hold the information of the title and author. User will choose which size of books they wanted to throw away (destroying the GameObject)

below is the code for the size and transformation to the gameobject.

  public int transform(){
         float sizeValue;
         sizeValue = Random.value;
         size= Mathf.RoundToInt (500*sizeValue+300);
         float s=size/100; //s is scale ratio 
         transform.localScale += new Vector3(s,s,s);
         return s;
     }

I donno how to make the arrays for the gameobject and assign them with variables, also, adding the random generated function from another class. Can someone provide guidance on this? Thank you