I am looking for a book series that upon completion will leave a feeling of emptiness, as if I'm saying goodbye to a good old friend, when you realize the good old days were left behind. It's a shitty feeling that only comes after something great, something that left a mark on you.
The locked tomb series
Project hell mary
Compound fractured
Thank you for the recommendations! I just read Project Hail Mary, and it fucked me up ๐ . I'll look the other recommendations up.