Castlebooks emails
Castlebooks sends about 1 email a week through Klaviyo, most often on Wednesday around 12 AM Eastern.
- ESP
- Klaviyo
- Emails a week
- about 1
- Busiest send time
- Wednesdays at 12am ET
- Last sent
- 17 days ago · Oct 15
- Tracked since
- Mar 2026
- Emails collected
- 20
Recent emails
Oct 15, 2026 6:30 PM
New arrivals updated
Oct 14, 2026 11:14 PM
Welcome to Castlebooks
Oct 7, 2026 6:15 PM
New books for October reading
Sep 20, 2026 7:45 PM
Bargains galore
Sep 9, 2026 7:30 PM
Bargains galore
Recent subject lines
All subject linesSubject lines average 22 characters. Each one opens the email it came from.
| Picture | Sent (Eastern) | Subject | Preview text |
|---|---|---|---|
| Oct 15, 2026 6:30 PM | New arrivals updated | More books and plenty of lines back in stock | |
| Oct 14, 2026 11:14 PM | Welcome to Castlebooks | Thanks for signing up! | |
| Oct 7, 2026 6:15 PM | New books for October reading | Check out the new arrivals | |
| Sep 20, 2026 7:45 PM | Bargains galore | Sept 20th Update | |
| Sep 9, 2026 7:30 PM | Bargains galore | New titles, new deals | |
| Aug 24, 2026 10:30 PM | More new remainders | New lines for the end of August | |
| Aug 11, 2026 10:15 PM | More new remainders | Some lovely cookery, art and kids books | |
| Aug 4, 2026 12:31 AM | New arrivals for August | New lines for the new month |
Archive
View full archiveSeptember 2026 2 emails
View allSep 20, 2026 7:45 PM
Sep 9, 2026 7:30 PM
When Castlebooks sends
20% of its emails arrive in the 12 AM hour, with a second, smaller wave around 6 PM. Wednesdays are the busiest day.
| 12a | 1a | 2a | 3a | 4a | 5a | 6a | 7a | 8a | 9a | 10a | 11a | 12p | 1p | 2p | 3p | 4p | 5p | 6p | 7p | 8p | 9p | 10p | 11p | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mon | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 |
| Tue | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
| Wed | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 3 |
| Thu | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 0 |
| Fri | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Sat | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Sun | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
| Mon | Tue | Wed | Thu | Fri | Sat | Sun | |
|---|---|---|---|---|---|---|---|
| 12a | 2 | 1 | 1 | 0 | 0 | 0 | 0 |
| 1a | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
| 2a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 3a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 4a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 5a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 6a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 7a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 8a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 9a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 10a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 11a | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 12p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 3p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 4p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 5p | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 6p | 0 | 0 | 1 | 1 | 0 | 0 | 0 |
| 7p | 0 | 0 | 1 | 0 | 0 | 0 | 1 |
| 8p | 1 | 0 | 0 | 1 | 0 | 0 | 0 |
| 9p | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| 10p | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
| 11p | 0 | 1 | 3 | 0 | 0 | 0 | 0 |
FewerMore(busiest cell: 3 emails)
Based on 20 emails received from Mar 19 to Oct 15, 2026. Times in US Eastern. How we collect · When all brands send
How often Castlebooks sends
Complete months have run between 2 and 3 emails.
- Busiest month
- Jun 2026, 3
- Quietest month
- Apr 2026, 2
- Busiest day
- Wednesday, 8
- Quietest day
- Friday, 0
About Castlebooks
- ESP
- Klaviyo
- Tracked since
- Mar 2026
- Emails collected
- 20
- Emails a week
- about 1
- Last sent
- Oct 15, 2026
- Sends from
- books@
castlebooks.com.au - Subject length
- 22 characters avg
Counts include automated emails such as a welcome series.
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| 1UP USA1up-usa.com · Top 500,000 sites | Klaviyo | Top 500,000 sites | about 1 | Thursday | Oct 29, 2026 | Klaviyo · about 1 a week · busiest Thursday · last sent Oct 29, 2026 |
Report an errorLast updated Nov 2, 2026