This is a set of the two books "Tools of Radio Astronomy, 6th Ed." by T.L.Wilson, K. Rohlfs, S. Hüttemeister and "Tools of Radio Astronomy - Problems and Solutions, 2nd Ed." by T.L. Wilson and S. Hüttemeister. Tools of Radio Astronomy, 6th Ed.: This 6th edition of “Tools of Radio Astronomy”, the most used introductory text in radio astronomy, has been revised to reflect the current state of this important branch of astronomy. This includes the use of satellites, low radio frequencies, the millimeter/sub-mm universe, the Cosmic Microwave Background and the increased importance of...