I have noticed many readers who stick to the same series of books over and over again. The Wimpy Kid series is our most popular series at Willow Springs. Other series such as Dork Diaries, Origami Yoda, Geronimo Stilton, and Magic Tree House remain quite popular with our readers. Yet we have many individual stories in our fiction section that are largely ignored. Some of the best books I have read in recent memory are not part of a series. For example, The Marvels, Serafina and the Black Cloak, The Graveyard Book, The Old Willis Place, and Crenshaw are all excellent stories that are single, stand-alone tales.
It's OK to read a series of books you really enjoy. Goodness knows I re-read the Harry Potter series countless times. But it's always important to step beyond the series shelf to see what other stories might spark your interest. Take a walk among the stacks and see which books speak to you!