I know just what you mean - I'm on a light-hearted fluffiness kick lately myself, to help with job-hunting woes. Here are a few of my go-to authors:

- Will Thomas' Barker and Llewelyn mysteries (staring with Some Danger Involved). It's historical mystery series set in Victorian London - enough of a history/geography lesson to keep your brain happy and learning new things, but the writing is very breezy and undemanding. Probably falls into the "cozy mystery" category too, since there's rarely anything more graphic than a broken nose.

- Sharon Lee and Steve Miller's Liaden series (many different starting points - Fledgling and Agent of Change are both good places to start, and are free on Amazon and through the publisher at Baen's Free Library). Science fiction action/adventure with a dash of romance, and a strong emphasis on family and honor. These books have been my dear companions for years, and especially if you like Bujold's Vorkosigan series, you may find some new friends here too.

- For more of the same fluffiness in the fantasy vein, I really enjoyed Sharon Lee's Carousel Seas, too - a contemporary fantasy involving a magical carousel and a small, sleepy beach town in Maine. A fun, swift read, and with some very thoughtful worldbuilding.

- Rachel Aaron's Eli Monpress series (the first three books are collected together as The Legend of Eli Monpress). Funny, lighthearted fantasy series centering on a thief who can talk to the spirits inside everyday objects, and his band of fellow misfits. Try the free sample on Amazon: if the first scene (where Eli successfully talks his way out of prison by convincing a stubborn door to open) doesn't catch your heart, you are a stronger person than I am.

- Skewing to the YA fantasy end of the spectrum, Diane Duane's Young Wizards series (starting with So You Want to Be a Wizard) is quick and quirky - young wizards having wacky adventures in New York City, making friends with talking white holes, and discovering the power of a good library. This series was started before Rowling's Harry Potter series, but if you like one, you might like the other too.

- Some other possibilities, off the top of my head...

Tea with the Black Dragon (fantasy / light romance)
The Long, Dark Tea-Time of the Soul (fantasy / humor - Douglas Adams)
Earthrise (science fiction / light romance - MCA Hogarth, one of my favorite new authors)

[...and I might add a few extra items to this list later today, since I'm sure I'm forgetting a few right now!]

Hugs to you, and best wishes for a swift resolution of your medical troubles.