Hi Leanne! I apologize for taking so long to answer your question. I don't know how I could have missed it.
To answer your question, yes, there will be more books in the series, at least I plan on it. I love Evan and Julien too much, and it doesn't feel like their stories are finished being told yet. However, I can't predict when I'll write the next one since I usually write when the ideas unexpectedly hit me, like when I see a photo or a holiday is coming up. It was Julien's voice that started IAFYDS, and he's been quiet lately, but I can assure you when he speaks there's no way of shutting him up until I write down everything he wants to say :) So there's the long answer to your question. Yes, there will be more stories with Evan and Julien, and most likely Michael too. Maybe even stories with Michael by himself as he grows to be friends with Evan and Julien. Thanks for your question! :)