Book Recommendations for 12 year olds

My sister loves reading and needs more book recs which are appropriate for her age. Her most recent reads which she loved are Keeper of the Lost Cities by Shannon Messenger, The School for Good and Evil by Soman Chainani and Hex Hall by Rachel Hawkins. (I'd prefer if the books have minimal romance or no romance). She would also like it to be in first person. Thank you in advance <3