I've managed to find 14/15 of the books and just can't seem to figure out where the last one is located. Here are the places I've managed to find/receive a book: 

1- Inn Library on shelf

2- On bookshelf in Wodehouse's room

3- In barrel of Wine cellar

4- In Piano 

5- In Dug up Treasure chest 

6- Floor of Cafe - under bread

7- On barrel in Blacksmith 

8- Purchased at Item Shop

9- At Carpenter's (near his room I think?)

10- On top of shelf at Tailors

11- In bookshelf of Newspaper shop (when you sneak in)

12- On top of shelf at the Farm house

13- From Remus the Bellhop (once he is moved to the Inn)

14- In box in Coral Cave

Can someone help me find the last one?

This is a great list - very detailed! I'm sure others will find this useful too, and I hope other players will be able to point you in the right direction for the last book!

there's one in the cabinet of the lounge once you furnish it.