Thank you for opening the PR. To be frank, I don't quite have the capacity to review the PR properly right now. It will be a bit before I can properly take the time to review all the changes thoroughly.

Good to see that Readarr also has easy-to-use APIs. Never quite got into the details of that.
Do you by chance know how well this works together with Chaptarr?

Just built and deployed this branch. It seems working well so far.

Thanks for this!

I'm running it now and I noticed something that might be intended or not - when I add a book (that's not in my Readarr already) to Wishlist in ABR then, if the book is found in Goodreads by Readarr, ABR adds the book to Readarr but it stays in Wanted > Missing. If I then want to actually download the book I need to go to Readarr and click "Automatic Search" (or "Interactive Search") for that book.

However, if I navigate to the book in ABR's /wishlist I can see all the indexer results and if I click "Send to download client" ABR will again send the book to Readarr but Readarr will actually download it this time.

Also, I can work around the Wanted > Missing issue by removing the book from ABR's /wishlist/downloaded and readding it, this time it will be downloaded.

Could this be because Readarr hasn't finished doing the search before the you create the book? So even though you do include searchForNewBook: True it doesn't find it yet? I'm not familiar with the Readarr API but it seems like a timing issue.

Apologies if I'm misunderstanding something! Thanks again for the awesome feature.

I'm not sure why the searchNewBook: True doesn't seem to be working (in my instance at least), but triggering the search manually after adding the book seems to work:

diff --git a/app/internal/readarr/client.py b/app/internal/readarr/client.py
index 2a4624a..a4e949e 100644
--- a/app/internal/readarr/client.py
+++ b/app/internal/readarr/client.py
@@ -1,6 +1,7 @@
 from __future__ import annotations

 import re
+from typing import Literal

 import aiohttp
 from aiohttp import ClientSession
@@ -32,6 +33,7 @@ _SearchResults = TypeAdapter(list[ReadarrSearchResult])
 _QualityProfiles = TypeAdapter(list[ReadarrQualityProfile])
 _MetadataProfiles = TypeAdapter(list[ReadarrMetadataProfile])
 _RootFolders = TypeAdapter(list[ReadarrRootFolder])
+_Book = TypeAdapter(ReadarrBook)


 def _headers(session: Session) -> dict[str, str]:
@@ -82,7 +84,7 @@ async def _search(

 async def _add_book(
     session: Session, client_session: ClientSession, book: ReadarrBook
-) -> bool:
+) -> ReadarrBook | Literal[False]:
     """POST /api/v1/book — add a book (and its author if new) to Readarr."""
     base_url = readarr_config.get_base_url(session)
     if not base_url:
@@ -109,7 +111,7 @@ async def _add_book(
                 title=book.title,
                 foreignBookId=book.foreignBookId,
             )
-            return True
+            return _Book.validate_python(await resp.json())
     except Exception as e:
         logger.error("Readarr: exception adding book", error=str(e))
         return False
@@ -250,10 +252,14 @@ async def readarr_add_and_search(

     book.monitored = True
     book.addOptions = ReadarrBookAddOptions(
-        searchForNewBook=True,
+        searchForNewBook=False,
     )

-    return await _add_book(session, client_session, book)
+    new_book = await _add_book(session, client_session, book)
+    if new_book:
+        return await _trigger_book_search(session, client_session, new_book.id)
+
+    return not(not(new_book))

There is also an issue with the way one book can be requested in ABR and the way Readarr responds to it. I can dig up the exact example, but there are several names for the same book and Readarr could not "find" that book. When I get home I will dig up the answer.