I am currently learning Latin from the Bloomsbury Latin to GCSE books. In one of the reading passages the following constructions are used:
"non cupio rex vester esse. dei signum mittent si me regem esse cupiunt."
I have translated this as "I do not want to be your king. The gods will send a sign if they want me to be king." I am perplexed as to why, in the second sentence, 'regem' is used instead of 'rex'. I was under the impression that verbs of existence, including the infinitive, take the nominative case and indeed in the first sentence the infinitive appears to do just that.
I have noticed that there are a few mistakes in this text so the explanation might be nothing more complex than that, but still I wanted to ask.
Many thanks in advance.