Impossible Whodunnit But more importantly HOWdunnit Michael Dahl Presents the most mystifying new mysteries for young readers. Bestselling author Michael Dahl has curated a list of page-turning mind-popping and brain-dazzling puzzlers from some of his favourite - and trickiest - authors. Young readers will be surprised challenged tricked and ultimately delighted following the adventures of super-sleuths not too different from themselves. Their cries of That could never happen will transform to Why didn't I think of that as they eagerly reach for the next book in the series.