Here is a free website that has access to thousands of online books. There is a free 30 days trial when you sign up on the homepage, which hopefully should give you support in having plenty of new reading material to share with your children!
https://www.getepic.com/?utm_channel=search&gclid=EAIaIQobChMIjKXju_eo6AIVVuDtCh3tmwIWEAAYASAAEgJTP_D_BwE
Below is a link to Oxford Owls Ebooks. These are similar to the books that we have in school.
https://www.oxfordowl.co.uk/for-home/find-a-book/library-page/