Sorry for the relatively short review graphic… I had to make this in a bit of a rush between revision-y things because it’s the start of the exam season! But, honestly, I can’t recommend The Boy Who Swam with Piranhas enough- one brilliant author, one brilliant illustrator, one fantastic MG read (:
the bibliomaniac book blog 
Love a visual review!
I’d second your recommendation for this book. Some readers have found it a little slow at the beginning, I’ve insisted they persevere … and they have loved it too.
Yay! I really liked the first few chapters or so- made me giggle, with the uncle going “MACHINEMACHINEMACHINE” xD