Your child finally loves a book, and it's a comic. Good. Every one of these is book one of a long, still-growing series, so the moment they finish and beg for more, there are already ten more waiting. That's the whole idea here: get them hooked on a series, and you've just bought yourself a year of bedtimes.
Every book here is the first of a series a child can fall into and not climb out of for months. They're arranged so the easiest, gentlest ones come first and the busier, more action-packed ones come later, but the real design is width, not height: whatever your child clicks with, the point is that there's a whole shelf of it behind them. The trail is done the day they finish one and ask for the next.