The Skeleton Puzzle
Lisa Thompson
Scholastic

The young detectives of Chestnut Close – Matthew, Melody and Jake – return to try and solve another mystery. A skeleton is discovered buried in the garden of their neighbour, Old Nina and the three are determined to find out who it is, how it got there and who was responsible. Jake has also found what looks like a wedding ring.

Then Nina’s long-lost son turns up, with a young son of his own. The boy is obsessed with a shape-shifting puzzle that he manipulates all the time. Are the two really who they claim to be? The three friends are suspicious and think they could well be imposters. The deeper they dig, the more they suspect the father, who calls himself Michael, almost certainly is.

Meanwhile Jake is struggling at home with his sick mother and is trying to keep this to himself; and Matthew is acting somewhat mysteriously.

With priceless jewels possibly hidden somewhere on the Close, this twisting-turning mystery will keep you on tenterhooks, right through to the final page, which sets things up for the next in the series.

A Stocking Full of Spies
Robin Stevens
Puffin Books

It’s almost Christmas in 1941 and a bomb has fallen on Deepen School for Girls : May and Nuala have been removed from the chaos there and sent to join May’s and Eric’s elder sister, Hazel Wong, who is working at Bletchley Park. Almost immediately they find themselves working on their most dangerous case thus far. One of the codebreakers has been shot and in his pocket is discovered a top-secret message.

Was he in fact a spy, was the message planted on him; was this just a tragic accident or murder?: Whatever it was Daisy’s brother, Bertie has been blamed; even Bertie himself is unsure whether he was actually responsible for the death. Hazel and Daisy set Nuala, May and Eric the task of finding out what actually did happen and thus proving Bertie’s innocence. The three of them are acting as messengers between the huts but Bletchley Park is a secretive place wherein a number of Britain’s most brilliant minds are at work, they will have to listen, watch and they hope, unearth the truth. They are very different characters: May is impulsive and Nuala and Eric more considered in their actions, so they’re an interesting team.

Then a second murder takes place – are they linked? Was it the same murderer again? What a challenge the three face.

A clever cracker of a story for confident readers from Y4 onwards: it works was a standalone but it would be better to read the previous two books first.
(In her author’s note, Robin Stevens suggests that many of the Bletchley Park staff were neurodivergent though in the story we’re never told if this applies to any of the characters featured.)