A Dragon in Class 4.....what are the next books in this series?

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I have just read the first book to ds (6) and he adored it!

If he pulled his finger out he could have had a go at it himself but he chooses not to atm.

The story is so sweet though so I recommend it to boys and girls of 5-8.

DS's school reading book is currently A Dragon in Top Class so that might give you a bit of a clue as to how the titles go. DS is 7 and not finding it at all hard going. Apparently (he read to DH yesterday) he struggled with "disparaging" last night.