* Mono

  <a href="http://www.oreilly.com/catalog/monoadn/">
  Mono: A Developer's Notebook
  </a>

  <a href="http://www.amazon.de/exec/obidos/ASIN/3827264928/qid=1050051051/sr=2-1/ref=sr_2_3_1/028-2755135-1623712">
  Mono: .NET-kompatible Anwendungen mit dem Open Source-Framework
  </a>

* C#

   A Programmer's Introduction to C# - Second Edition: Eric Gunnerson

* .NET Framework

   Avery good techincal book about .NET is Don Box's <a
   href="http://service.bfast.com/bfast/click?bfmid=2181&sourceid=39391960&isbn=0201734117">Essential
   .NET</a>

* Remoting

   <a href="http://www.dotnetremoting.cc/book/AdvancedDotNetRemoting.asp">Advanced .NET Remoting: Ingo Rammer</a>

* Threading

   .NET Multithreading: Alan L. Dennis (ISBN 1-930110-54-5)

* Web Services

   Web Services: Architecture and Implementation with .NET: Keith Ballinger

* ASP.NET

   Essential ASP.NET with Examples in C# by Fritz Onion

   ASP.NET in a Nutshell by G. Andrew Duthie & Matthew MacDonald

   Programming ASP.NET by Jessy Liberty & Dan Hurtwitz

* Compiler Implementation

   Compilers - Principles, Techniques, and Tools: Alfred V. Aho, Ravi Sethi,
   Jeffrey D. Ullman 

   Advanced Compiler Design Implementation: Steven S. Muchnick

   Modern Compiler Implementation in C: Andrew W. Appel

   A Retargetable C Compiler - Design and Implementation: C. Fraser, David
   Hanson

* Reference Manuals

   <a
   href="http://developer.intel.com/design/pentium/manuals/24319101.pdf">Intel
   Architecture Software Developer's Manual, Volume 2 - Instruction Set Reference Manual</a>

   <a
   href="http://www.caldera.com/developers/devspecs/abi386-4.pdf">System V ABI
   - i386 Architecture Processor Supplement</a> 

   <a
   href="http://www.caldera.com/developers/devspecs/mipsabi.pdf">System V ABI -
   MIPS Processor supplement</a>

   <a href="http://www.sparc.org/standards/V8.pdf">The SPARC Architecture
   Manual Version 8</a>