Hi @Rob Cole! My answer depends on your goals. If it's important to you that wide print book distribution (Ingram) is live and ready on launch day, then I would recommend uploading to Ingram ASAP. Their initial processing takes about 3-5 days on average (but can be delayed, especially for new accounts), then each retailer will take anywhere from 1 day to over a month to update their online catalogs. For KDP ebook, if you want your ebook to be guaranteed to go live on a specific launch day, then I'd recommend setting up a preorder. You can set up a preorder up to a year in advance without the actual file being ready, but be aware that you'll need to have your final files uploaded at least 72 hours before your launch day. For KDP print, you can either set Ingram up early and let them host your print book on the Amazon retail side until you upload directly into KDP on launch day (this allows for preorders to be placed ahead of your launch) or you can set up a scheduled release. KDP doesn't offer a native print preorder option, but you can set up a scheduled release at least a week in advance of your launch date and KDP will process your files early and then hold them until your chosen date. For Draft2Digital (what we use for wide ebook distribution, including libraries), you'll want to set up your ebook around 10 days ahead of your launch. TLDR: I would suggest uploading everywhere around two weeks ahead of your launch if you aren't doing a preorder push, but longer is safer in case there are file issues or account glitches. We always err on the side of caution when it comes to upload and launch timing over here. :)

@Yna Davis Could you weigh in here, please? Thank you!

@Julie Broad Nope, you covered it all!

@Mary Catherine Liscinski Hi! We always vary our keywords and categories for print and ebook and haven't had any issues with that causing them not to link. The title, subtitle, and author name should match exactly for ease of linking, but not the categories/keywords. And Julie is exactly right - the selectable categories for print/ebook definitely differ, too.