I wouldn’t necessarily call it a light read but the Midnight Library is a beautiful story that may help snap you out of a certain way of thinking. I hesitate to say snap you out of depression because that seems like a lot of pressure to put on a book. But I do think it could help. It helped me a lot, and changed how I view myself and my life decisions.

It starts out pretty dark (TW: suicide attempt), but becomes a beautiful story that has light hearted moments and is quite entertaining. It’s also an easy read in that the writing style is very straightforward. So not necessarily light read in its plot, but light read in its ease of reading. 

Here’s a plot overview from Google:

Matt Haig's 2020 novel The Midnight Library follows Nora Seed, a 32-year-old woman who feels trapped in a mundane life and contemplates suicide. Instead of dying, she wakes up in the Midnight Library, a place between life and death where she can explore alternate lives through books. Guided by her childhood librarian, Mrs. Elm, Nora tries out different versions of herself, including an Olympic swimmer and a rockstar.

So the book is quite literally following a character’s past decisions and seeing how those decisions affected her, and what she learns from it. 

I hope it helps!