So a very interesting game has led to a very weird problem. I've been role-playing as a Welsh dude who becomes obsessed with the legend of King Arthur (yes I realize that is rather anachronistic given that this is pre-Geoffrey of Monmouth). So he changes with name to Arthur Pendragon and sets out to return the British Isles to the rule of the True Britons (i.e. the Welsh), giving his kids very Arthurian names (Merlin, Lancelot, Galahad, etc.) along the way. Things were going according to plan for awhile, with Arthur uniting Wales and then invading Ireland to build up a resource base for him (or more likely his son) to eventually invade England itself. But then while I was sitting around waiting for a truce to expire, the Pope declared a Crusade and pretty much all of my vassals up and joined it. At first Arthur regarded it as a distraction from his main goal, but after a year or so he gave in to peer pressure and sent all the armies he could muster to the holy land. Much to his surprise, this distraction became a very lucrative one, as when the dust settled, Arthur became King of Jerusalem.
But here's the problem: my favorite son, Prince Lancelot, who I wanted to be my heir (Wales is an elective monarchy) was captured by the Caliph and he just won't let him go. The matter is further complicated by the fact that the Caliph himself is my prisoner. One would think we could work out some sort of prisoner exchange: the Caliph's freedom for Lancelot's or something, but the game has no mechanism to do that. I did a quick search of Paradox's forum to see if anyone had ever had a similar problem and the only advice anyone had was to spam the prisoner with gifts in hopes that he would eventually have the riches to ransom himself. I'm going to try that. There really should be an option in the game that would allow someone to pay the ransom for a close relative, or at least force a prisoner to release his own prisoners. Until I find a solution I'm just going to have to come to terms with terrible-stats Merlin or the still underaged Galahad as my heir.
I think that option does exist. It's either on Lancelot's, the Caliph's, or the Caliph's regent's (as he's in jail) page, where you can ask to ransom Lancelot. If you can afford it, the AI usually accepts, and if he holds no lands, he shouldn't need more than 10 gold.
Also, quick question, what's the ransom for a Caliph?