Click to receive personalized book recommendations daily.
Check Out These
21 Books You’ve Been Meaning to Read
See the List

The Whodunit Detective Agency Series

Martin Widmark and Helena Willis
Dubbed “the children’s Agatha Christie” in his native Sweden, Martin Widmark’s international best-selling  illustrated chapter book series follows classmates Jerry and Maya on their crime solving adventures in the small town of Pleasant Valley.
The Diamond Mystery #1 by Martin Widmark; Illustrated by Helena Willis
The Movie Theater Mystery #7 by Martin Widmark; Illustrated by Helena Willis
The Gold Mystery #8 by Martin Widmark; Illustrated by Helena Willis

The Whodunit Detective Agency Series : Titles in Order

Book 8
When a valuable shipment of gold disappears from the vault at the Pleasant Valley bank, Jerry and Maya are called in to help crack the case.  There are no witnesses and there’s nothing on the security cameras, so it feels like the gold vanished into thin air.  But once again, with their super sleuthing skills, the young detectives help the police chief get to the bottom of the mind-boggling mystery.
Book 7
Jerry and Maya are on the case again!

Doodle Bug is the third dog that has mysteriously disappeared in Pleasant Valley. But the police chief has no idea who the dog-napper might be. When Jerry and Maya hear strange sounds coming from the basement of the Rio Cinema, they quickly realize it just might be a clue. Can Pleasant Valley’s doggy detectives get to the bottom of this canine caper?
Book 6
Jerry and Maya, classmates and best friends, are on the case again and ready to solve the latest caper in this international bestselling series!
 It’s Christmastime in Pleasant Valley and the town is getting ready to celebrate. But when all the lockers at the Pleasant Valley swimming pool are emptied during the Big Holiday Swim, it looks like Christmas won’t be very merry. Once again, Jerry and Maya use their super sleuthing skills to help the police chief track down the mysterious thief before he ruins Christmas for the whole town!
Book 5
What’s going on at the art museum in Pleasant Valley? Did the Egyptian mummy really come to life after 3,000 years? The terrified night watchman claims that he saw the mummy walking around the museum. The very same night, the most valuable painting in the museum was cut out of its frame. Once again, young detectives Jerry and Maya are called in by the chief of police to get to the bottom of the strange and spooky events.
Book 4
Jerry and Maya, classmates and best friends, are on the case again and ready to solve the latest caper in this international best-selling series.

A robber has struck at Cafe Marzipan, Pleasant Valley’s best bakery, three times in the past year! And as usual, the police chief has no clue as to who the clever culprit might be.  Once again, he calls upon the super sleuthing skills of best friends Jerry and Maya to help him catch the tricky thief. Will they be able to look past the muffins, croissants, and tarts and catch the robber?
Book 3
Jerry and Maya, classmates and best friends, are on the case again and ready to solve the latest caper in this international best-selling series

Circus Splendido has come to Pleasant Valley! But so have pickpockets who are stealing wallets, cell phones, and jewelry from the audience as they watch the performers under the big top. Once again, the police chief asks Jerry and Maya to help him collect clues and sniff out suspects. Will the friends be able to crack the latest caper in town?
Book 2
It is Christmas Eve, and the grand Braeburn family has come to stay in the luxury suite of Valleby’s hotel. With them, they have brought their extremely valuable dog. The hotel manager promises the family that he’ll take great care of their dog—but before they know it, the dog has gone missing without a trace! Jerry and Maya, the local young detectives, are brought in to help sniff out the missing hound. All the evidence suggests that one of the hotel staff had a hand in the case, but who could it be?
Book 1
Somebody is stealing diamonds from the jeweler Mohammed Carat! It looks like the culprit is someone on his staff, but who? Is it Luke Smith, the recently hired fitness fanatic with a taste for the finer things in life? It surely can’t be Vivian Leander, the loyal shop assistant who is now short of money . . . The police in the little town of Valleby are stuck, so they contact young detectives Jerry and Maya, classmates who run their own detective agency. Will Jerry and Maya be able to use their detective skills to find the thief? As they well know, even a tiny clue is worth its weight in gold.
Back to Top