[7] Kelly Hurst, Puffin's editorial director who had acquired UK and Commonwealth rights for the title, revealed that he always recommended Sleepovers as the best of Wilson's book, saying, "it's wonderful to see how Jacqueline captures perfectly the real-life joys and woes of friends and sisters in this sequel".

[6] Hurst revealed that the charity Disability Rights UK had worked with Wilson and Puffin in order to ensure that Lily's story was told with positive representation.

[8][9] Nikki Holt received an email from someone from Wilsons' PR team telling her about the dedication, which she was impressed by, and she expressed happiness that there was Makaton in a mainstream book, calling it "just amazing".

[8] Speaking of its role in the story, Wilson explained that Lily, despite being non-verbal, is able to communicate well due to having learnt Makaton, meaning that she is able to make jokes and help Daisy gain advantage over the girl who has been causing her suffering.

[8] Wilson tried to reflect the change of technology and attitudes in The Best Sleepover in the World by updating the setting to modern times despite the characters being the same ages in the prequel.

[3] Talking about the changes, Wilson explained "There is a lot that is weird about modern times, but we should congratulate ourselves in that we're much more accepting of people who are gloriously different in all sorts of ways".

[10] Steve Forster, Hampshire County Council's executive member for education, expressed delight that the events took place due to believing that they would help encourage a long-term love of reading and books.

[14] Pam Norfolk's review in Lancashire Evening Post called the sequel heartwarming and noted that it explored "those all-too-familiar worries about bullying, disabilities, siblings and friendships" that had been depicted in Sleepovers.

[4] Norfolk wrote that Dean's "beautifully emotive" illustrations brought the "sensitively written and inspirational story to life" and noted that readers would enjoy following the characters through "another rollercoaster chapter of family and friendship dramas".