Book'em! handles reservations for trips and classes, including reservations for recurring and one-time-only events, invoicing, sponsorships, estimating, staff scheduling and payroll, waiting list, cancellations, customer credit accounts, gift certificates, etc. Book'em! has powerful marketing tools such as contact tracking, appointment scheduling, and built-in mail merge -- either print or email. The program also helps you track your customers' interests and histories so you can effectively market your current schedules. Version 4 adds many new features, including direct email capability for confirmations and letters, non-consecutive day class session scheduling, a streamlined reservation process, event categories, expanded reporting capabilities, two-tier source tracking, enhanced calendar, larger screens, and more.