Crikey! Im a voracious reader & rarely take offence - a gift is a gift & should be appreciated as such. But I'd be a bit
at receiving this from a colleague, and would start to wonder about their interactions with me.
Then I'd tell myself off for overthinking.
Then I'd distance myself from that colleague.
I think it's a bit of an overstep to give a self-help book to colleagues. For me, personally, I find self-help books a bit glib - I'd rather go read Freud, or Winnicott, or Paiget, or whoever.