Disappearing Diamonds is an enjoyable experience for young readers.' The West Roxbury Transcript
'Move over McGruff the Crime Dog, Upton Charles is here to sniff for clues and solve your mysteries.' Cantabrigia

'The beginning, middle and ending flow well together to make this a good story with educational and entertaining elements. It's perfect for school-aged kids.' KIDS FIRST!

'This dog takes a bite out of crime.' 
Cambridge Chronicle

'Upton Charles will make a believer out of every reader.'
Midwest Book Review

'Perfect for the read-to-me or the I-can-read-it myself 
age group.' Boston Globe

'D. G. Stern's delightful series of adventures starring 
Upton Charles.'

'Upton Charles is a positive character, the family members are appealing and the story is engaging. The illustrations are quite simple and the story's historical facts give it extra depth.' KIDS FIRST!

'Told from the viewpoint of a very special dog, 
"Winter Wonderland" promises to be a great mystery 
reading experience for kids ages 8-11. "Winter Wonderland" also can be read aloud by an adult as an exciting chapter book for a younger audience.' Midwest Book Review

'The action-packed mysteries are intended to be "read with me" books so that parents and teachers can be involved with reading at an earlier age. Older readers can also read through and enjoy them on their own.'

'This story is entertaining and educational with historical facts and valuable social lesson to be learned. The messages inherent in the story is that things do not always have to be worth a lot of money to be valuable.' KIDS FIRST!

'Logical deductive thinking, teamwork paying attention 
to attention to random clues to put the jigsaw puzzle
together, who would think these skills could be helped and taught by a dog, even a very smart dog?'

'As a teacher of constructive logical, deductive thought, Upton rules.' Midwest Book Review

'One of its appealing aspects is that it is a mystery, the other is that the main character is a dog detective who thinks out loud as the narrator of the story. Note, he is not a talking dog, just a dog whose thoughts we can hear.' KIDS FIRST!

'To solve the paw-fect crime, call Upton!' The Harvard Coop

'The book does a wonderful job of showing the prospective of a dog's point of view and we see Upton's special talent. He can solve crimes, but still has dog in him.'  KIDS  FIRST!                                                                                      

'The adorable, astute Upton is full of energy and humorous “remarks” as he tries to communicate with humans. This is sure to be a favorite with most all children!'
 Rockin’ Book Reviews

'The author brilliantly infuses historically significant facts into the narration in a painless and entertaining manner'

'Another wonderfully entertaining adventure in author D. G. Stern's outstanding 'Upton Charles: Dog Detective' series, "Tip Top" is especially and highly recommended for young readers ages 7 to 11 and will prove to be an enduringly popular addition to both school and community library fiction collections for young readers.'
Midwest Book Review