The Chocolate Shark Shenanigans by JoAnna Carl

Lee and her husband have purchased a house not far from them.  Her husband, Joe, plans to fix it up and resell.  There's another buyer trying to outbid them but the sellers are sticking with Joe's offer.  When Lee takes the plumber down to the basement to check on the pipes, she sees some rags in the crossbeams overhead.  Her husband had cleaned that room, so she asks the plumber to get it down.  He drops it and a gun goes off.  It almost hit Lee!

Berkley and Net Galley let me read this book for review (thank you).  It will be published November 5th.

They are both amazed to find a gun in the rags.  It's a gun that has been missing for a long time.

The next surprise was a dead body in the cupboards of the garage.  It's the other buyer and he's been murdered.  To add insult to injury, they suspect Joe as a suspect.  After all, they had words about the sale of the house in a public place.  Lee is ready to do her own snooping.  She knows Joe didn't do it.

They finally figure it out after many questions, but the killer is coming after them now...