read some of Pendragon. yes, I'd call them kiddish, but still a good read.
I started reading before the entire series had been written yet though, so I got to I think book 7 or so (last I read was called The Rivers of somethingstartingwithaZ), before I ran out of what was published. Then I got distracted and never finished them

Considering the author's writing style I can imagine a rather predictable ending to the series, and would guess my ending probably overlaps with like 90% of the actual ending lol