Book of Cagliostro Clean up return with Jonathan the unstoppable timing

[stranglebat]

With Jonathan the unstoppable returning in clean up and the book of calgliostro's discard to return in the clean up phase

 

can you discard Jonathan  to return book and then have Jonathan immediately return off its only trigger?

[Thoras]

Yes, as both effects are your effects and they both occur at the same time, you are allowed to choose the order that those effects occur in.