<human>: hi all!

I'm an artist working in a new creative field. This summer I met a group of people who work in this field. They meet up, share work, hook each other up with gigs. It's great. Everyone has been so nice. The guy who started the group has hooked me up with work that has honestly been life-changing in terms of getting in the game.

He is married, I am married, there's nothing remotely there in terms of flirtation. We message a bit about work and life, and it's fun to talk shop. We have said we should meet up with our spouses, but haven't yet because we live 45 mins apart and are busy. 

So, I just saw this amazing new book in our field come out, and my first thought is to get it for him to thank him. It's about $50. I want to really genuinely thank him for almost singularly getting the ball rolling for me.  Just recently he recommended me for a job that will pay the rent for months.

He is a little reserved but we have struck up a nice friendship. I just don't want to overstep. has anyone been in this situation?

Condense the text into a few key points
<bot>: new colleague/ friend has almost singularly jump started my career, but I don't want to be inappropriate by getting him a present. How to thank him?