This review appears on paperbackparis.com:
The ‘Truly Devious’ series goes out with a bang in its final installment. The intrepid Stevie Bell makes it back to Ellingham Academy after a series of tragedies disrupt the school’s idyllic environment. She knows who committed the crime of the century, as the original Ellingham kidnapping/murders came to be known. But, now, she must piece together the present-day murders. Are they connected to the original killings? Are they even connected to each other? In The Hand on the Wall, a page-turner from start to finish, Maureen Johnson provides those who have followed the mysteries of Ellingham Academy from the beginning with a satisfying conclusion.
Stevie’s deal with the villainous Edward King – a Senator cut from the Donald Trump mold – damages her budding romantic relationship with King’s secret problem child, David. After getting himself beaten up on purpose at the end of The Vanishing Stair, David is missing and, on top of that, Stevie’s advisor has been killed in a house fire. The uncertainty of the school’s future after these tragic deaths, combined with Stevie’s personal problems and academic demands, provide an anxiety-driven sprint to the finish as pieces of the puzzle start coming together in unexpected and chilling ways.
As with the two previous installments, Johnson alternates between perspectives told from the players of the original Ellingham affair and Stevie’s efforts in the present. The link between past and present becomes clearer as time passes, and the mysteries of the school continue to reveal themselves. Stevie’s advisor was convinced Albert Ellingham made a codicil in his will stipulating that any individual who discovers the whereabouts of his daughter, Alice, and returns her, alive or dead, will receive millions of dollars. If such a codicil exists, Stevie wonders, are the present-day murders motivated by the same entity that spurred the original crimes? Money makes a monster of us all, and it seems there are those who will stop at nothing to get what they want.
While this novel and its predecessor, The Vanishing Stair, suffer a little from the sophomore slump destined to plague most sequels, the entire series is a satisfying whodunit for young adults. Rereading the first two installments would be ideal before plunging into the final book, but Johnson’s unflagging ability to engross readers with her suspense-filled prose and character-driven narratives shines through in this ending – a perfect way to spend a few hours in the dead of winter.