mystery of the missing book

okay, so i just copied another book from the library. it is called "The Casebook of Abnormal Psychology" or some sort.  i found that book interesting because it presents the cases that we usually find in the sphere of clinical psychology, which is why the book is pretty important for me as a student with specialization to Clinical Psychology, and thus led me to copy that book in the first place. i copied that library book along with 2 of my friends, making the book being copied 3 times. the price of copying the book is Rp. 33,000 each. so then i paid Rp. 99,000 (along with my friends' books that they will have to pay for) and i put those books (3 copied books and one original book) inside a black 'kresek' bag.

long story short, in the middle of the day i have to go to Campus 1. I remembered hooking that 'kresek' bag in my motorcycle along with my backpack on the footstep of the (matic) motorcycle because at that time i was thinking,  
"is it really safe to hook this 'kresek' bag here?" 
but i ignored the thought. 

the trip from my campus (Campus 2) to Campus 1 is not that far, and i was riding along with 2 friends in the backseat (yeah, i know that's against the law :D ) and none of us feel anything different. When i parked my motorcycle and try to get the 'kresek' bag, that was when i realized the 'kresek' bag wasn't there!! i suddenly felt my heartbeat stopped for a while. but i shouldn't be panicked. 
"maybe it fell somewhere in the way, and it was left in there." 
was my thought at that time. so i wasn't panicked and tried to retrace my steps back to Campus 2. but when i managed to retrace the steps, i still couldn't find the bag i was looking for! whoaaa, after that, a wave of panic starts to rush in. 
"what should i do? what will happen when i couldn't return that library book? how are my friends gonna react when i tell them that the book is missing?"
those questions jumbled up in my head, making me unable to think something else. even after i double-checked the road, looking for something black and (seemingly) heavy 'kresek' bag, i still haven't found what i was looking for! huhuuuu *teary*


the BIG question here is, you know, the bag was kinda heavy (yeah, with 4 books gathered in one bag, no wonder). so if it fell from the motorcycle, i should feel something fell off the motorcycle, right? (at least the sound of *bum*, considering the weight) but i didn't feel or hear a thing, and neither did my friends who was riding with me. and if it really was fell of the motorcycle, then the people walking by should recognize that something tumbled from the motorcycle and at least warned me about it (considering the street i passed was rather small and crowded with home residents). but they weren't, and after i retraced the steps for the second time and asked them whether or not they have seen a 'kresek' bag with books in it, they didn't notice it at all!



hell, even after i went back retracing my steps for the THIRD time (with a little help from my friend, Astrid) and asked the home residents one by one, i still haven't found that damn little black 'kresek' bag with the library book in it! arrgghh~

*what should i say to the librarian on duty when i couldn't return the book? the classic saying, "the book is missing, sir" is unacceptable, i think :'(