Zues' reason is probably to get an excuse to kill Percy when he retrieves the bolt (which the gods might not know he did even though in the book they do) so that Percy will get blamed for his theft and zues can kill him.
It is also because, the gods cannot enter another god's place (you know zeus-sky, hades-underworld, Poseidon-Sea) without an invitation. They need heroes to do their business on earth.
The crisis in the Lightning Thief is when the bolt was stolen from Olympus, which led on to the beginning of the Lightning Thief's story.
Someone stole Zeus' Master Lightning bolt.
The bolt was stolen by Luke, who was being manipulated by Kronos.Luke Castellan stole Zeus's lightning bolt in the Lightning Thief.
Luke stole it, he Stole the Helm of Darkness and The Lightning Bolt
In the first book, The Lightning Thief, they are searching for Zeus's stolen lightning bolt.
Percy retrieved the lightning bolt that had been stolen from Zeus.
Zeus has his lightning bolt stolen in Percy Jackson and the Lightning Thief.
Percy's real reason for going on the quest to retrieve the lightning bolt is to clear his name and prove that he is not the lightning thief. He also wants to find out the truth about his parentage and understand his place in the world of demigods.
Percy Jackson takes the lightning bolt in "The Lightning Thief" by Rick Riordan. He is mistakenly accused of stealing it and goes on a quest to retrieve it to clear his name and prevent a war among the gods.
The deadline for returning the lightning bolt in "The Lightning Thief" is the summer solstice, which is ten days after Percy Jackson embarks on his quest to retrieve it. If he fails to return it by then, a war between the gods will break out.
The crisis in the Lightning Thief is when the bolt was stolen from Olympus, which led on to the beginning of the Lightning Thief's story.
Luke Castellan stole the lightning bolt
Someone stole Zeus' Master Lightning bolt.
the lightning bolt was stolen from Zeus.
The bolt was stolen by Luke, who was being manipulated by Kronos.Luke Castellan stole Zeus's lightning bolt in the Lightning Thief.
Percy decides he must retrieve the lightning bolt stolen from Zeus in order to complete his quest in "The Lightning Thief." This is the key task set out for him to clear his name and prevent a war among the gods.
Three similes are lightning robber, bolt bandit, and bolt thief. Hope these help but not sure if you meant from the book or just in general.