Multiple POV book about 5th grade library club

in 7th grade my teacher assigned me to read this book about a library club, with multiple povs, all kids with varying degrees of bad home lives. i believe the title has the name of a teacher (Ms. something? if i remembered i wouldnt be here lol) PLEASE PLEASE PLEASE HELP ME I LOVE THIS BOOK AND IT HAS A SEQUEL I NEED TO READ IT