The Song in the Stars - Starborn Knights, #1

Lumia Emelisse will never leave her home planet. A weak heart made sure of that. She's content with it, unlike her twin brother, Sol, who has spent his life studying the stars. He wants to escape to distant cosmos, but Lumi is fine where she is in her shop... right? That is until an ancient army takes over the entire planet in seconds, lead by a queen of her darkest nightmares, and she seems to have a vendetta against the Emelisse family specifically.
Lumi escapes only through dumb luck, but soon finds herself on the other side of the universe. Lumi is in an unknown galaxy, surrounded by aliens and fighting a ticking clock to get anyone to listen to her pleas. All she has is a dysfunctional group of smugglers to help her, each caught in their own personal war. Yet, when she learns the Queen has a closer tie to her family than she first realized, she knows Sol will be the one to pay for it.
The answer to why leads to a mysterious song calling out from somewhere between the folds of space. It promises a power that could bring an end to these tyrannical monsters, or offer the already powerful queen an undefeatable godhood. Between criminal organizations, exploding cats, and weapons that change form on a whim, Lumi's only choice might be to follow the music to the very edges of the universe - but how much of herself will she lose along the way?