A.E. Stanfill 
Big Ben The Mean Guinea Pig [EPUB ebook] 

Justin has always wanted a pet. A dog a cat even a turtle would work.
His parents would always tell him no; he wasn’t responsible enough for that yet. Until one day his Mom and Dad agreed to take him to the pet store.
That’s when Justin saw him: the perfect pet. A guinea pig that was different from all the others. Colors, fur, looks and all.
That was the one Justin wanted, and that was the day his life would change forever.
The fourth book in A.E. Stanfill’s Monster Files series, Big Ben The Mean Guinea Pig is a fun, action-packed story for readers of all ages.