Hi,
@jgm63 had a thread on the peaceful pill ehandbook and from what to careful.
You can access to the The 2019 edition is here.
Unfortunately, I can't share my book with you because they have a limit of 3 devices, I hope to find a way to hack it somehow.
If you looking for N supplier, in the new edition, A is the only one recommended now.
If you want, you can tell me what you search for and I'll check it in my book