1) Free BookBub Featured Deal management spreadsheet https://blog.reedsy.com/bookbub/

2) KindleTrends data resource https://kindletrends.com/

3) Dabble - a cloud-based alternative to Scrivener https://www.dabblewriter.com/

4) Great blog post from Written Word Media https://www.writtenwordmedia.com/how-to-write-a-book-to-market/

5) My Benidorm Digital Nomad podcast: https://anchor.fm/benidormdigitalnomad