I love the Berenstein Bears too.
I thought when you meant trashy you might have meant something with a poorly clad, hunky man on the cover. I fear I have never read any.
I did read a rather poorly written sci-fi novel a few years back that I, nevertheless, quite liked and learned a good deal from anyhow. It was called The Last Fleet. Dull plot. Unrealistic characters. Good romp.
I also read a whole series when I was thirteen called The Animorphs. Rather dreadfully written, two-dimensional, implausible series about six kids acting as the only opposition to an Invasion of the Bodysnatchers style alien invasion. I loved every page of them.