Especially for Halloween, the marvellous, brilliant, genius, Tony Ross - author and illustrator of the Horrid Henry books - shows you how to master fangs, claws and roars. Email your drawings in to childrens.books@guardian.co.uk - the most beastly beasts will appear in a gallery on the Guardian children's books site. Altogether now... ROOOAARRR!Photograph: Tony RossEspecially for Halloween, the marvellous, brilliant, genius, Tony Ross - author and illustrator of the Horrid Henry books - shows you how to master fangs, claws and roars. Email your drawings in to childrens.books@guardian.co.uk - the most beastly beasts will appear in a gallery on the Guardian children's books site. Altogether now... ROOOAARRR!Photograph: Tony RossEspecially for Halloween, the marvellous, brilliant, genius, Tony Ross - author and illustrator of the Horrid Henry books - shows you how to master fangs, claws and roars. Email your drawings in to childrens.books@guardian.co.uk - the most beastly beasts will appear in a gallery on the Guardian children's books site. Altogether now... ROOOAARRR!Photograph: Tony RossEspecially for Halloween, the marvellous, brilliant, genius, Tony Ross - author and illustrator of the Horrid Henry books - shows you how to master fangs, claws and roars. Email your drawings in to childrens.books@guardian.co.uk - the most beastly beasts will appear in a gallery on the Guardian children's books site. Altogether now... ROOOAARRR!Photograph: Tony RossEspecially for Halloween, the marvellous, brilliant, genius, Tony Ross - author and illustrator of the Horrid Henry books - shows you how to master fangs, claws and roars. Email your drawings in to childrens.books@guardian.co.uk - the most beastly beasts will appear in a gallery on the Guardian children's books site. Altogether now... ROOOAARRR!Photograph: Tony RossEspecially for Halloween, the marvellous, brilliant, genius, Tony Ross - author and illustrator of the Horrid Henry books - shows you how to master fangs, claws and roars. Email your drawings in to childrens.books@guardian.co.uk - the most beastly beasts will appear in a gallery on the Guardian children's books site. Altogether now... ROOOAARRR!Photograph: Tony RossEspecially for Halloween, the marvellous, brilliant, genius, Tony Ross - author and illustrator of the Horrid Henry books - shows you how to master fangs, claws and roars. Email your drawings in to childrens.books@guardian.co.uk - the most beastly beasts will appear in a gallery on the Guardian children's books site. Altogether now... ROOOAARRR!Photograph: Tony RossEspecially for Halloween, the marvellous, brilliant, genius, Tony Ross - author and illustrator of the Horrid Henry books - shows you how to master fangs, claws and roars. Email your drawings in to childrens.books@guardian.co.uk - the most beastly beasts will appear in a gallery on the Guardian children's books site. Altogether now... ROOOAARRR!Photograph: Tony RossEspecially for Halloween, the marvellous, brilliant, genius, Tony Ross - author and illustrator of the Horrid Henry books - shows you how to master fangs, claws and roars. Email your drawings in to childrens.books@guardian.co.uk - the most beastly beasts will appear in a gallery on the Guardian children's books site. Altogether now... ROOOAARRR!Photograph: Tony RossEspecially for Halloween, the marvellous, brilliant, genius, Tony Ross - author and illustrator of the Horrid Henry books - shows you how to master fangs, claws and roars. Email your drawings in to childrens.books@guardian.co.uk - the most beastly beasts will appear in a gallery on the Guardian children's books site. Altogether now... ROOOAARRR!Photograph: Tony Ross