The best way for to find a good book is to browse the Library and ask your teachers, friends and Mrs Festivo for suggestions! You could also have a look at some of our recommended Books of the Week in the school newsletter.
If you find a book that you really want to read that isn't in the Library, have a chat with Mrs Festivo and she might be able to get a copy for you.
For more ideas, particularly in school holidays, you or your parents might find book recommendation websites helpful. Why not try...
or 
If you have certain books or authors that you have already enjoyed and want some recommendations based on those, you could try Booktrust's What to Read After tool or, if you can't find their favourite books on this then try What Should I Read Next - but be aware that this is not a site aimed specifically at children so some of the results may not be age appropriate.