Help with my next book

Dear Mr. Korman I am a 10 year old 5th grader from Tennessee and have wrote and published about 15 books and am making my next one right now and can’t really think of any ideas for it and was wondering if you could give me some tips on what to write about I kinda want it to be like your book Swindle and like your book Restart and it at the moment I was wondering if you could give me any tips off of my idea about the main character is going to own some exotic pets