A good book series for young adults would be the Louise Rennison series, with the first book being Angus, Thongs and Full Frontal Snogging.
This is a good and easy read for young adults.
Some of you may have seen the film Angus, Thongs and Perfect Snogging, which is based on the first 2 books, which is a brilliant film, but nothing on the books
The books are a diary entry from a girl called Georgia Nicolson, and how her life progresses as she grows up and had different problems during her school life.
I enjoyed the series and I hope others do aswell.
There are 10 books in total and may be more coming in the future.
Hope this has helped.