Who is the kronos and titans lightning thief?

There seems to be a misunderstanding. There is no character named "Kronos" in *The Lightning Thief* by Rick Riordan.

Here's what we know about the story:

* Kronos is the main antagonist in the *Percy Jackson & the Olympians* series, but he doesn't appear until the second book, *The Sea of Monsters*.

* The Lightning Thief features Zeus, the king of the gods, as a major character and is the one accused of stealing the lightning bolt.

Perhaps you are thinking of another book or are confused about the characters? Please let me know if you have any further questions.