Actually, 'Dork Diaries' Book 10 is 'Tales from a Not-So-Perfect Pet Sitter'. The main crew is pretty consistent by this point, but their dynamics get a fresh twist with the whole pet-sitting plot.
The absolute core is, of course, Nikki Maxwell, telling the whole story through her diary. Her best friends, Chloe and Zoey, are right there with her, trying to help manage the pet-sitting chaos. The main antagonist, MacKenzie Hollister, is naturally involved, causing trouble as usual. The big one is Brandon Roberts, Nikki's crush—their will-they-won't-they tension is a major thread, especially with the pets creating accidental bonding moments. You also get Nikki's family: her mom, dad, and her younger sister Brianna, who is a chaotic force of nature all her own.
What I liked this time was how the animals almost became characters too, forcing interactions and misunderstandings that pushed the main human relationships forward. Brianna nearly steals the show, as usual.