• vell book,
• nell book,
• hell book,
• gell book,
• bwll book,
• bsll book,
• bdll book,
• brll book,
• b4ll book,
• b3ll book,
• bekl book,
• bepl book,
• beol book,
• belk book,
• belp book,
• belo book,
• bell vook,
• bell nook,
• bell hook,
• bell gook

The adjective form of the phrase "bell book" could be "bell-booked".

The plural form of "bell book" is "bell books".

The singular form of the word "bell book" is "bell book".