MSDN Bookstore Regular coverage of latest COM-related books, selected by Microsoft. http://msdn.microsoft.com/resources/books.asp

Inside COM A guide to building elegant COM components, presents how accessible COM can be, particularly for those familiar with C++. It is an insightful, progressive view of COM design with illustrations in the form of code samples. By Dale Rogerson, Microsoft Press. http://www.amazon.com/exec/obidos/ASIN/1572313498

Understanding ActiveX and OLE Learn about Microsoft technology without getting bogged down in programming details: COM (object technology), OLE (technology for compound documents), and ActiveX (powerful new technology for the Internet). By David Chappell, Microsoft Press. http://www.amazon.com/exec/obidos/ASIN/1572312165

Designing Component-Based Applications Provides coverage of application development based on the COM and MTS. Demonstrates the principles of effective COM-driven design and MTS deployment. A full-featured enterprise application was built using a set of development guidelines, by Mary Kirtland, Microsoft Press. http://www.amazon.com/exec/obidos/ASIN/0735605238

Essential COM The book reveals the essence of COM, helping developers to truly understand the why, not just the how, of COM. By Don Box, Addison Wesley. http://www.amazon.com/exec/obidos/ASIN/0201634465

Essential COM Errata Book errata. http://www.develop.com/essentialcom/errata.asp

TachyonSpell ActiveX spell-check component. Contains an English dictionary of 102,000 words, and uses "Fuzzy Logic" for its suggestion matching algorithm. [Commercial] http://www.tachyon-labs.com/tspell.htm