I’m a bit more relaxed than some others. I don’t outright ban twaddle, but I make sure there are plenty of alternatives. I also reserve the right to say no to anything based on questionable content. There are a few things that my kids just love, however, that I consider twaddle, but I let them read them. An example is a series called “The Puppy Place”, about a family that fosters dogs until they find their ‘forever home’. It’s pure fluff, but the message is good and they are fun. A little treat is okay. They have limits on how many books they can take from the library, however, so the twaddle is controlled. My DS will take out every “Puppy Place” books he can find that he hasn’t already read, but he is also working his way through “The Hobbit”, so I’m okay with that. DD loves Magic Tree House books, but just finished the “Among the … People” series and now working through the “Twins” books. I aim for a balance in favor of quality, but don’t sweat about a little fun. They are actually moving more toward the non-twaddle as they mature.
Another thing I do is require a certain amount of reading as part of ‘school’ that must be from a list I provide.
As someone else mentioned, an eReader is a great help. Each child has their own and they are chock full of great books!
Joanne