You can level up by creating cars (experience is always awarded for crafting cars):
First of all, with the help of teleport hack and dupe (by Sraksis), you achieve the level of crafting the first car (crafting items), and then create cars until you achieve the required level (need ~1500 first cars - the longest way) This method is much faster than books, but also more difficult.
About teleport hack:
The upper-left corner is the starting coordinates (y increases when moving down, x increases when moving to the right). Using a fuzzy search, you searching coordinates(FLOAT) of the character, and then change them (do this without equipped transport!!!)
I made a map with the coordinates of big cities, if I can find it, I will send it.