The other characters in the book are slightly one-dimensional; Tom's father is always claiming to want to stay fit but sneaking biscuits, his sister Delia is often mean and snarky to him but ends up saving the day when he forgets to mail in an entry to a t shirt design contest, and his teachers a bit waffly and ineffectual. I do appreciate that even with Marcus, Tom is understanding and not mean. This makes a big difference between this and the US Wimpy Kid series.
The hand-lettered font and copious pictures will appeal to fans of Stick Dog and Charlie Joe Jackson, and many readers will use this book as an arguing point to get a wall of their room painted in black board paint just like Tom, so they can doodle all over a wall. All of Tom's exploits are amusing, humorous, and pure fun to read. I am not overly sad that this series is fourteen books long in the UK!